# Percentage Calculator

Calculate a percent of a value before and after,

or find the percentage change between two values,

and see **how to calculate** each one.

numbers/images/pct-calc.js

## Examples:

- Apply 10% to 100, and see how each value was calculated
- Try 12.5% of 50: the "50 less 12.5%" value is 43.75.
- Then try 12.5% of 43.75 (shows that before a 12.5% reduction it
**was**50.) - Compare 100 to 110, and see that to go from 100 to 110 is a 10% increase, but to go from 110
**back down**to 100 is a 9.09% decrease*(not a 10% decrease)*

## Note:

x% of y is the same as y% of x

### Example: 10% of 15 is the same as 15% of 10

- 10% of 15 = 1.5
- 15% of 10 = 1.5