On this site, you can always calculate interest online through ready-made special calculators for instant calculations. You can also learn formulas in order to calculate interest on your own. You can easily determine the percentage on a regular calculator or even in your mind.
Online interest calculation
You can calculate online. Use the following simple calculator for this:
Examples of calculations online using the percentage calculator
How much will be 13 % of the number 352
Outcome - 45.76
How to calculate: make up a proportion -
352 this is 100 %
X is 13 %
We multiply the numbers taken diagonally: 352 * 13 = 4576 and divide the resulting product by 100: 4576 / 100 = 45.76
Результат: 42.51
Sometimes the term "coefficient" is used to explain the solution. This is when the original figure from which they are looking for a percentage is first divided by 100. Thus obtaining a coefficient corresponding to one percent of this original figure. 352 / 100 = 3.52. Then multiply this coefficient for the desired percentage: 3.52 * 13 % = 45.76
From the number 3800 determine 20%
Outcome - 760
How to calculate: let's make a proportion -
3800 is to 100% as X is to 20%
To determine X, you need to multiply 3800 by 20 and divide by 100. The result is 760.
How to calculate 24 percent of 450
Let's use the coefficient obtained by dividing the original figure by 100. So 450 is divided by 100. Thus, we will define what is ONE percent of 450. It turns out 450 / 100 = 4.5. One percent of 450 is 4.5. And the task says to determine 24%. So we it remains only to multiply the resulting coefficient by 24. Результат: 4.5 * 24 = 108.
An easy way to determine the percentage of a number
Let's take a closer look at the scheme for determining the percentage of a number. We will see that this is an equation in which the denominator is always number 100. For example, to determine 18% of 571, you need to solve the equation: 571 x 18 / 100. And in the numerator - there is always the desired percentage (in our example the number is 18). So you can first get the coefficient 18 / 100 = 0.18, and then multiply it by the original number.
Why is this scheme useful? Because division by 100 can be done mentally! And on the calculator the initial figure from which the percentage is being searched is multiplied immediately by it. Like this: 571 x 0.18 = 102.78
How easy is it to divide by 100? You ask. It's very simple - we move an imaginary decimal point (comma) two characters to the left:
was 18 became 0.18
was 45 became 0.45
was 87 became 0.87
and so on.
Successful calculations and successful studies!