Calculate 20 percent of an amount

Calculate 20% of a quantity can be very useful at a given moment to know the discount applied in an offer or any other purpose.

Our percentage calculator will allow you to to get that 20 percent of the figure you want immediately. Just type the amount, press the Calculate button and you will automatically know the value of your 20%. If you want to calculate any other percentage, do not hesitate to visit our percent calculator.

How to calculate 20 percent of an amount

To calculate 20 percent of a number we only have to apply a simple rule of three:

20 percent formula

In this case, each unknown would be:

  • B: Number from which we want to find its 20%
  • Nos quedaría saber el valor de 'Y' cuyo valor sería el 20 por ciento del número inicial.

We can clear the value we are interested in as follows:

Y = quantity x 20 / 100 = quantity x 0.2

To make it clearer, we will now see how the above applies to a practical example.

Calculate 20 percent of 50

Calculate 20%

To obtain the 20% of the number 50, we will use the formula we have seen before:

Y = quantity x 0.2 = 50 x 0.2 = 10

As you can see, it is very easy calculate 20 percent of any number with a simple multiplication

Calculate 20 percent in Excel

If you want to calculate the 20% of a cell in Excelthe formula to be used is as follows:


Where cell you have to write the coordinates of the cell where the number you want to calculate the percentage is located.

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