What is Percentage Increase / Decrease?
Percentage change shows how much a number has grown or shrunk relative to its original value. It's the standard way of reporting price hikes, salary revisions, investment returns and exam-score improvements.
Formula
% change = ((New − Original) / |Original|) × 100 Positive → increase Negative → decrease
How to use this calculator
Enter the original value and the new value — the calculator labels the result as an increase or decrease automatically. Works with negative numbers; the absolute value of the original is used so the sign of the change is clear.