Calculate Percentage Change

Change: +25.00%
Absolute delta: +25.00
Direction: Increase

Formula

Percentage change = ((new - original) / |original|) x 100

How it works

The calculator computes the absolute delta (new - original), then divides by the absolute value of the original amount. This supports negative baselines while preserving change direction.

If original value is zero, percentage change is undefined because division by zero is not allowed.

Source: Standard percent-change definition used in introductory algebra/statistics texts.