## About This Tool

The online Percentage Change Calculator is used to calculate the percentage change from one number value to another. If you want to calculate percentage increase, decrease or difference, this tool is right for you.

## Percentage Change Formula

A percentage change is a way to express a change in a variable. It represents the relative change between the old value and the new one (or original number and second number used in this calculator).

Generally, if V_{1} represents the old value and V_{2} the new one, the percentage change is calculated by the following formula:

Percentage change = (V_{2} - V_{1}) / V_{1} × 100%