If you want to calculate the result of taking a set percentage off a number this is how you do it! You can use the percentage off calculator below to work out your figures if you are looking for a quick answer, below the calculator you will also find the workings behind the answer and the percentage off formula.

## Percentage Off Calculator

## How to work out a percentage off

Here is the method for working out what the result is from taking a set percentage off an amount. A is the initial value and B is the number of percent you want to take off:

- Work out what 1% of the original amount (A) is - we'll call this value C, to do this just divide it by 100: C (1%) = A / 100
- Multiplying this by the number of percent you want to take off (B) : C × B = Amount to reduce
- This gives you the value of the reduction.
- Subtract the reduction from the original amount to show the new value.

With the figures above you would do the following:

320 ÷ 100 = 3.2 (1% of the initial amount) So: 3.2 × 25 = 80 Then: 320 − 80 = 240. In other words, 25% off 320 is 240.