% Increase / Decrease Calculator
Find the percentage increase or decrease between two values.
Whether it's a price change, a stat comparison, or a performance metric, percentage change between two values is one of the most commonly needed — and commonly miscalculated — figures in everyday math.
The formula, and the mistake people make
Percentage change is (new − old) ÷ old × 100. The mistake is dividing by the new value instead of the old one — always divide by the starting value.
Frequently asked questions
What does a negative percentage change mean?
It indicates a decrease from the starting value.
Is this the same as percentage points?
No — percentage change is relative, while a percentage point change is an absolute difference between two percentages.