How to calculate the percentage of the amount?

Mankind has long mastered how to calculate the percentage of the amount. The word itself came from the Latin "per cent", in fact, in English it remained so. "Percent" - in the literal translation "hundredth part". The name is very accurate, because this concept means exactly one hundredth of the sum. If you forgot the school science and want to understand how to get this share from a number, say 280 550, you just have to divide it into one hundred (or put a comma two figures closer to the beginning). Thus, we will get 2,805.50. And how do you know how much of the above amount will be three percent? It's very simple: multiply one hundredth (in our example it's 2,805.50) by three. It turns out 8 416,50.

As you can see, it's very simple. If you still do not get the right to make the process of dividing the original digit by 100 and multiplying the result by the required amount of interest, then there is another, absolutely elementary, way of calculating interest. As a rule, a modern person always has a calculator. On most models of this computing device, above the buttons with numbers there are specific icons, and one of them is the "%" icon. With this button, the calculation process will not take more than two seconds. Let's say you need to find out how much will be 7% from 550. You dial 550, then click on the "x" (multiply) button, then you type 7, and then, instead of the "=" icon, press the "%" key. The scoreboard shows the result: 38.5.

But sometimes we need to learn not how to calculate the percentage of the amount, but on the contrary, what percentage one number is from the other. Here is a simple example: two numbers are 1100 and 253. What is the percentage of 253 of the total number of 1100? In order to calculate this, we need to multiply the smaller number (253) by 100, and divide the result by a larger number (1100). It turns out 23%. Sometimes you need to calculate the amount after deducting some interest. Often this applies to salaries. You know the size of the salary, but it's interesting to know how much you will get in your hands after the salary is deducted from the salary amount. We type on the calculator the amount of salary, click on the "-" icon, then we enter the number of hundredths that the state charges as taxes, and click on "%".

How to calculate the percentage of the amount using Excel? In the column where we want to put the required%, we need to enter the "=" icon, then the number from which we calculate the percent, then the multiplication sign, and finally the number of hundredths. Then we press "Enter", and the result appears in the cell. For clarity, let's give an example: =, 1750, *, 48,%, Enter. Before the operation, you need to configure the program for calculations: click the left mouse button on the cell.

People who are far from computing in their daily lives are often bought for attractive, supposedly insignificant, payments for loans in banks or pawnshops and often fall into a mess. How to calculate the percentage of the loan amount correctly? It is necessary not only to calculate the credit arithmetically, but also to multiply the amount received by the amount of time (days, months, years) for which it is registered. For example, you want to buy a car and take in the bank 150 thousand at 13% per annum for 5 years. How much do you need to pay the financial institution for these five years? We consider: 150 000 x 13% x 5 years = 97 500 (and this is only interest). To this amount, you still need to add the debt itself: 97,500 + 150,000 = 247,500.

Therefore, do not buy on the promises of extremely low rates, but you need to weigh everything and calculate it in your head or on a calculator. It is not for nothing that bankers, even in the Middle Ages, developed entire complex tables showing how to calculate the percentage of the amount given to the borrower. These calculations were first declassified only in 1584. And by the way, did you know, where did this badge, meaning a percentage, come from - "%"? He appeared in circulation only in 1685 thanks to ... simple short-sightedness. At that time in Paris for students-merchants a "Guide to Commercial Mathematics" was published. The typewriter overlooked and adopted the symbol "cto", widespread until the end of the 17th century, which denoted the one hundredth part, for two small noices separated by slashes. Happened %. And since this was a textbook, a new generation of merchants took the badge as a given.