3 from the total amount. How to count interest

How to calculate the percentage of the amount, you need to know in many cases (when calculating the state duty, loan, etc.). We will tell you how to calculate the percentages from the amount using the calculator, proportions and known ratios.

How to find out the percentage of the amount in the general case?

After that there are two options:

1. If you need to know how much percent is another amount from the initial, you just need to divide it to size 1% obtained earlier.
2. If you need the amount of the amount that is, say, 27.5% of the initial, you need 1% size to multiply to the required interest.

How to calculate the percentage of the amount by proportion?

But you can do and otherwise. To do this, you will have to use knowledge about the method of proportions that are held within the framework of the School Course of Mathematics. It will look like this.

Let us have a - the main amount equal to 100%, and in the amount, the ratio of which with and in percent we need to know. We write down the proportion:

(X B. this case - number of interest).

According to the rules for calculating the proportions, we obtain the following formula:

X \u003d 100 * in / a

If you need to know how much the amount will be in with the number of percent of the amount A, the formula will look different:

B \u003d 100 * x / a

Now it remains to substitute the well-known numbers in the formula - and you can calculate.

How to calculate the percentage of the amount with the help of known ratios?

Finally, you can use more simple way. To do this, it is enough to remember that 1% in the form of a decimal fraction is 0.01. Accordingly, 20% is 0.2; 48% - 0.48; 37.5% is 0.375, etc. It is enough to multiply the initial amount to the corresponding number - and the result will mean the size of interest.

In addition, it is sometimes possible to use simple fractions. For example, 10% is 0.1, that is, 1/10 consequently, to find out how much 10% will be, simply: you just need to divide the initial amount by 10.

Other examples of such relations will be:

• 12.5% \u200b\u200b- 1/8, that is, you need to divide on 8;
• 20% - 1/5, that is, you need to divide by 5;
• 25% - 1/4, that is, divided by 4;
• 50% - 1/2, that is, it is necessary to divide in half;
• 75% - 3/4, that is, you need to divide on 4 and multiply by 3.

True, not all simple fractions are convenient for calculating interest. For example, 1/3 is close in size to 33%, but it is not equal to exactly: 1/3 is 33, (3)% (that is, the fraction with infinite three times after the comma).

How to subtract the percentage of the amount without the help of the calculator

If it is required from the already known amount to take an unknown number that makes a number of interest, you can use the following methods:

1. Calculate an unknown number using one of the above methods, then take it from the source.
2. Immediately calculate the remaining amount. To do this, from 100% taking the number of interest that you need to deduct, and the result obtained is translated from the percent to any of the methods described above.

The second example is more convenient, so I will illustrate it. Suppose you need to know how much will it remain if from 4779 to take 16%. The calculation will be like this:

1. We take away from 100 (total percentage) 16. We get 84.
2. We consider how much will be 84% of 4779. We get 4014.36.

How to calculate (take away) from the amount percentage with a calculator in hand

All of the above calculations are easier to do using a calculator. It can be both in the form of a separate device and in the form of special Program On a computer, smartphone or a conventional mobile phone (even the oldest of the currently used devices usually have this function). With their help, the question is how to calculate the percentage of the amount is solved very simply:

1. The initial amount is recruited.
2. A sign "-" is pressed.
3. The number of interest that is required to subtract is introduced.
4. The "%" sign is pressed.
5. A sign "\u003d" is pressed.

As a result, the signed number is displayed on the screen.

How to take a percentage from the amount using an online calculator

Finally, now there are enough sites in the network where the online calculator feature is implemented. In this case, it does not even require knowledge of how to calculate the percentage of the amount: all user operations are reduced to the input of the desired numbers (or moving the sliders to receive them), after which the result is immediately high on the screen.

This feature is especially convenient to those who count not just an abstract percentage, but a specific size tax deduction or the sum of state duty. The fact is that in this case the calculation is more complicated: it is required not only to find interest, but also add a permanent part of the amount to them. An online calculator avoids such additional calculations. The main thing is to choose a site that uses data that comply with the current law.

An percentage is one hundredth share of something. From the definition it follows that anything is accepted for 100 percent. The percentage of the "%" icon is denoted.

How to solve the tasks in which interest is required from the number? The percentage of the number can be calculated both by the formula and calculator.

• Description of the task: the price of the basket of apples is 160 rubles. The price of the basket is 20% more expensive. How many rubles are more expensive to drain a basket?
• Solution: In this task, we require nothing more than to find out how many rubles are 20% percent of the number 160.

Percentage calculation formula:

1 way

Since 160 rubles is 100%, then first learn what will be 1%. And then you will multiply this number for the 20% we need.

• 160 / 100 * 20 = 1,6 * 20 = 32

Answer: Drain basket is more expensive by 32 rubles.

2 way

The second method is a modified version of the first method. Multiply the number that is 100% per decimal fraction. This fraction is obtained by dividing the amount of interest that you need to find 100. In our case:

• 20% / 100 = 0,2

We multiply 160 by 0.2 and we get the same answer 32.

3 way

3 way - proportion.

Make a proportion of the form:

• x \u003d 20%
• 160 = 100%

Alternate part of the proportion of the cross on the cross and get the equation:

• x \u003d (160 * 20) / 100
• x \u003d 32.

Calculating the percentage of the number on the calculator

In order to calculate 20% of the number 160 on the calculator, you need:

1. First dial the number 160 on the screen - that is, our 100%
2. Then click the Multiply button "*"
3. let us multiply by the number of interest that you need to find that is 20. Press 20
4. Now press the% key
5. The answer should be displayed: 32

Read more about percent calculation algorithms Read the article

In life, early or later everyone will face the situation when it will be necessary to work with percentages. But, unfortunately, most people are not ready for such situations. And this action causes difficulties. This article will tell you how to take away interest from the number. Moreover, they will dismant various methods Tasks solutions: from the simplest (using programs) to one of the most complex (using the handle and sheet).

Taken manually

Now we learn how to take away with a handle and a sheet. The actions that will be presented below studies absolutely every person in school. But for some reason, not everyone remembered all manipulations. So, what you will need, we have already figured out. Now let's tell you what to do. To make it more clear, we will consider the example, taking the basis of specific numbers. Suppose you want to take 10 percent of the number 1000. Of course, it is quite possible to turn these actions in the mind, since the task is very simple. The main thing is to understand the very essence of the decision.

First of all, you need to record the proportion. Suppose you have two columns with two rows. You need to remember one thing: numbers fit into the left column, and in the right - interest. In the left column, two values \u200b\u200bwill be recorded - 1000 and X. X. It is inscribed because it is it that symbolizes the number that will be found. In the right column will be inscribed - 100% and 10%.

Now it turns out that 100% is the number 1000, and 10% - X. To find the X, you need to multiply by 10. The value obtained is divided by 100. Remember: the required percentage must always be multiplied by the number, after which the work should be divided into 100%. The formula looks like this: (1000 * 10) / 100. In the picture, all formulas for work with percentages will be clearly depicted.

We had a number 100. It is it that lies under the most Xa. Now everything that remains to do is from 1000 to take away 100. It turns out 900. That's all. Now you know how to take away the percentage from the number using the handle and the notebook. Practice yourself. And over time, these actions can be performed in the mind. Well, we move on, telling about other ways.

We take away using the Windows Calculator

Clear business: if there is a computer, then few people want to apply the handle and notebook to calculate. It is easier to use the technique. That is why now consider how to take interest from the number using the Windows Calculator. However, it is worth making a small remark: many calculators are able to make these actions. But the example will be shown precisely using the Windows Calculator for greater understanding.

Everything is simple here. And it is very strange that few people know how to take away interest from the number in the calculator. Initially, open the program itself. To do this, enter the "Start" menu. Next, select "All Programs", followed by the "Standard" folder and select Calculator.

Now everything is ready in order to proceed with the solution. We will operate the same numbers. We have 1000. And it needs to take 10% from it. All you need is to enter the first number (1000) in the calculator, then press minus (-), then click on the percentage (%). As soon as you did it, the expression 1000-100 will immediately appear. That is, the calculator automatically counted how much it is 10% of 1000.

Now press ENTER or equal to (\u003d). Answer: 900. As you can see first, and the second method led to the same result. Therefore, it is possible to solve only you how to use. Well, we, in the meantime, go to the third, latest version.

Taken in Excel

Many people enjoy Excel. And there are such situations when it is vital to quickly make a calculation in this program. That is why now we will understand how to take a percentage of the number in Excel. In the program it is very simple, using formulas. For example, you have a column with values. And you need to take 25% from them. To do this, select the column next to and in the field for formulas, do it equal to (\u003d). After that, press LKM on a cell with a number, then we set "-" (and again click on the cell with a number, then enter - "* 25%). You should get on the picture.

As you can see, this is still the same formula that was brought for the first time. After clicking Enter, you will receive an answer. To quickly take up 25% of all numbers in the column, it is enough just to bring the cursor to the answer, placing it in the lower right corner, and stretch down to the desired number of cells. Now you know how to take the percentage of the percentage in the "Excel".

Output

Finally, I want to say only one thing: as can be seen from all of the above, in all cases only one formula is used - (x * y) / 100. And it is with its help with us and it turned out to solve the problem with all three ways.

Instruction

To calculate percentage of the number on the usual, follow the following sequence of actions. Dial the number of percent on the keyboard (the% button until you need to press). Click on any of the arithmetic actions signs ("+", "-", "x", "/" - in this case, this button is used as a separator when entering numbers). Now dial the number from which you need to count percentages. Click on the "%" button. The desired result will be displayed on the calculator indicator.

Drop percentage from the number can be using a computer. To do this, run the standard Windows. To do this, click "Start" -\u003e "Run" -\u003e Dial "Calc" -\u003e OK. If the calculator booted in the "engineering" form, then install it in the "Normal" mode ("View" -\u003e "Normal"). After that, count from the number, as described in the previous point of instructions.

To calculate interest from the number in the MS Excel program, type the following sequence of characters: "\u003d" "number" "*" "number of interest" "ENTER". So, for example, to calculate 13% of 10,000, enter the following formula in the desired formula: \u003d 10,000 * 13% and press "ENTER". If you did everything, then the number 1300 will appear instead.

Video on the topic

Sources:

• percentage of calculator

The percentage translated from Latin ("Pro Centum") means one hundredth share. Therefore, if a certain percentage is needed from a certain amount of money, it means that it is necessary to determine how many hundredths of the amount accommodates the specified percentage. If it is impossible to calculate in mind, it is easier to calculate the percentage with the help of a calculator.

Instruction

Use to calculate from the specified amount, for example, the standard Windows OS. The link to its launch can be found in the main menu of the system - open it by pressing the Win key or click the "Start" button. You need to go to the "All Programs" section, disclose the "Standard" subsection and click the Calculator string. However, hackers are not very complaining of "mouse computing" and if you also want to feel a little hacker, then press the Win + R keys, type the CALC command and press the ENTER key. Which methods start the same Windows calculator.

Find one hundredth share from the introduced number. To do this, use a keys with a slash (slash) on the keyboard or in the interface on the screen, and then enter the number 100.

Complete the calculation of the percentage of the amount by pressing the keyboard or click on the button with the equality sign. Calculator will show you a numerical expression of a given percentage of the amount entered.

Having access to the Internet in solving such a task you can do without a calculator. The network has a lot of its analogues that allow you to make the necessary calculations directly in the browser window. If there is no time to look for and such -Services, then enter the desired mathematical expression directly in the query field search engine Google and immediately get the result. For example, to calculate 13% of the amount at 25,512 14 kopecks, enter such a request: "25521.14 / 100 * 13".

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note

How to calculate interest%. In everyday life, you often need to be able to determine how much percent is this or another number from the integer. This is a mathematical action that is held in high school, maybe we come in handy in case of counting all kinds of credit paymentscalculation of relations with any purchases, and at work regularly have to use comparative characteristics, expressed in percent.

Helpful advice

How to calculate interest? April 4, 2012. Rubric: Training. No comments. Surely you have come across such a thing as a "percentage". And some even required him to somehow calculate. The first way is to calculate in the mind: the number from which you need to find a percentage should be divided into a service station and then multiply by the number of interest. Or immediately multiply the number percentage, expressed in hundredths (percentages to share a hundred). For example, you need to find 28% of the number 924.

Sources:

• how to calculate interest from the amount

The discovery of the contribution is a popular solution in order to ensure the safety of savings and multiply them. The return on the deposit depends on the interest established on it, as well as the method of their accrual. That is why it is important to be able to rely correctly.

You will need

• Calculator.

Instruction

To calculate interest on the deposit, specify how the accrual occurs. So, they can accrue in the end of the deposit period, quarterly or monthly. There are also two types of interest - simple and complex (with capitalization).

When accrued simple percent, they are listed on a separate account and are not attached to the deposit amount. It is easy to calculate them. To do this, the initial amount of the deposit multiply on annual bid. And on the number of days to which the contribution is opened. Then the resulting amount will remain divided by 100 and on the number of days a year (365 or 366). For example, the contribution of the amount of 100 thousand rubles. Opened for 90 days with a bid of 9.8% per year. The return on the contribution will be 2416.4 p. (100 * 9.8 * 90/365/100). If the contribution opens for a year you just need to multiply the amount of the contribution to the percentage.

When deposit with capitalization, accrued interests are joined by the amount of the contribution within the deadlines that are spelled out in the contract. Most often - monthly or quarterly. As a rule, the investor has a choice - to make capitalization of interest, or remove the yield. But subject to capitalization increases the amount of the deposit, respectively, and accrued interest are growing. To calculate the amount of the contribution, taking into account interest, the initial amount of investments must be multiplied by an annual rate and on the number of days for which the Bank conducts capitalization and divided by the number of days a year and 100. For example, under the contribution of 100 thousand rubles. With a rate of 9.8% with monthly percent capitalization, the amount of interest in January will be 832.3 p. (100 * 9.8 * 31/365). It turns out that for February, interest will be accrued on the amount of the contribution of 100 832.3 p. Further calculations are carried out similarly. If you want to calculate the amount of interest on the deposit during the set period, it is necessary to multiply the initial amount of the contribution to ((1 + the annual interest rate * number of days / number of days per year / 100) to the degree (the number of periods of interest accrual - 1).

Perhaps mathematics was not your favorite subject in school, and the numbers were frightened and put melancholy. But in adulthood, they are not going anywhere. Without computation, do not fill out the payment receipt of electricity, do not compile a business project, do not help the child with a homework. Often, in these and other cases, it is required to calculate the percentage of the amount. How to do this, if about what a percentage is mutual memories from school times? Let's stress memory and discern.

The method is the first: the percentage of the amount through the definition of the value of one percent

The percentage is one hundredth of the number and is indicated by the% sign. If you divide the amount by 100, then it will be one percentage of it. And then everything is simple. The resulting number multiplies to the desired number of percent. In this way, it is easy to calculate the profit on the deposit in the bank.

For example, you put the amount of 30,000 at 9% per annum. What will happen to? The amount of 30,000 divide on 100. We get the value of one percent - 300. We multiply 300 by 9 and we get 2,700 rubles - an increase to the original amount. If the contribution is for two or three years, then this indicator doubles or triples. There are contributions for which interest payments are made monthly. Then it is necessary to divide the 2700 for 12 months. 225 rubles will be a monthly profit. If interest is capitalized (added to common account), then every month the deposit amount will increase. And therefore the percentage will be counted not from initial contribution, and from the new indicator. Therefore, at the end of the year you will receive a profit no longer 2700 rubles, and more. How many? Try to calculate.

Method of the second: Translate interest in a decimal fraction

As you remember, the percentage is a hundredth part of the number. In the form of a decimal fraction, this is 0.01 (zero one hundred and one hundred and one hundred and integer). Consequently, 17% is 0.17 (zero of whole, seventeen hundredths), 45% - 0.45 (zero, forty five hundredths), etc. The resulting decimal fraction is multiplied by the amount, the percentage of which we consider. And we find the desired answer.

For example, let's calculate the amount income tax From salaries 35 000 rubles. The tax is 13%. In the form of a decimal fraction, this will be 0.13 (zero integers, thirteen hundredths). Multiply a sum of 35,000 0.13. It turns out 4 550. So, after deducting the income tax, you will be listed than the salary of 35,000 - 4 550 \u003d 30 050. Sometimes this amount is already called "salary on hand" or "clean". In contrast to this amount along with the tax of the "dirty salary". It is the "dirty salary" indicate in the advertisements about the company's vacancies and in labor agreement. The hands are given less. How many? Now you will easily consider.

Method Three: We consider it on the calculator

If you doubt your mathematical abilities, use the calculator. With it, it is considered faster and more accurate, especially if we are talking about large sums. It is easier to work with a calculator, which has a button with a mark percentage. The amount is multiplied by the number of percent and press the% button. The screen will display the necessary answer.

For example, you want to calculate what your childcare allowance will be up to 1.5 years old. It is 40% of the average earnings for the last two closed calendar years. Suppose average salary It turned out 30,000 rubles. On the calculator 30,000 multiply on 40 and press the% button. The \u003d key does not need to be touched. The answer will be displayed 12,000. This will be the magnitude of the benefit.

As you can see, everything is very simple. Moreover, the application "Calculator" is now in every cell phone. If the special button% does not have the device, then use one of the two methods described above. And multiplication and division produce on the calculator, which will make it easier and will speed up your calculations.

Do not forget: to facilitate counting there are online calculators. They act as well as ordinary, but always at hand when you work on a computer.

Four way: make up proportion

Calculate the percentage of the amount is possible by drawing up the proportion. This is another terrible word from the School Course of Mathematics. The proportion is equality between the two ratios of four magnitudes. For clarity, it is better to immediately understand specific example. You want to buy boots for 8,000 rubles. The price tag states that they are sold at a 25% discount. How much is it in rubles? Of the 4 quantities, we know 3. There is an amount of 8,000, which is equal to 100%, and 25% that need to count. In mathematics, the unknown value is called X. The proportion is obtained:

For the convenience of counting, we translate interest into decimal fractions. We get:

The proportion is solved: x \u003d 8 000 * 0.25: 1x \u003d 2 000

2 000 rubles - discount on boots. We subtract this amount from the old price. 8 000 - 2 000 \u003d 6,000 rubles (new price at a discount). This is such a pleasant proportion.

This method can use and to determine the value of 100% if you know the numerical indicator - say, 70%. At the general corporate assembly, the Chef announced that 46,900 units of goods were sold over the year, while the plan was made only by 70%. How much did it need to sell to execute a plan completely? We compile proportion:

Transfer interest in decimal fractions, it turns out:

We solve the proportion: x \u003d 46 900 * 1: 0.7x \u003d 67,000. These results were expected to be the authorities.

As you already guessed, the proportion method can be calculated how much percent is a numerical indicator from the amount. For example, performing a test, you answered correctly at 132 questions out of 150. How many percent of the task was done?

It is not necessary to transfer this proportion to decimal fractions, you can immediately decide.

X \u003d 100 * 132: 150. In the end, x \u003d 88%

As you can see, it's not so scary. A little patience and attention, and now the calculation of interest you are mastered.