Percentage Increase
Calculator
Calculate percentage increase or decrease. Results as you type.
Percentage Change
Fromto
25%
New Value After % Change
ValueChange%
100
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Frequently asked questions
How do I calculate percentage increase?
Subtract the original from the new value, divide by the original, multiply by 100. Example: from 80 to 100 → (100−80) ÷ 80 × 100 = 25% increase.
How do I calculate percentage decrease?
Same formula — if the result is negative, it's a decrease. Example: from 100 to 80 → (80−100) ÷ 100 × 100 = −20% decrease.