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Percentage Change Calculator
How much a value rose or fell, as a percentage of where it started.
Percentage change
How it works
Change = new value − old value Change % = change ÷ old value × 100 (a negative result means a decrease)
Worked example: old 200, new 250 gives a change of +50, so change % = 50 ÷ 200 × 100 = +25%, an increase. Reversed — old 250, new 200 — the change is −50, so change % = −20%, a decrease.
Frequently asked questions
Why can’t I work out percentage change from zero?
Because the change is divided by the old value, and dividing by zero has no answer. You need a non-zero starting value.
What does a negative percentage change mean?
The new value is smaller than the old one — a decrease. A positive result means an increase.
Is percentage change the same as percentage points?
No. Going from 20% to 25% is a rise of 5 percentage points, but a percentage change of 25%.
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