Percentage Change Calculator

Percentage change compares the difference between two values with the starting value. Going from 80 to 100 is a 25% increase.

Type a number and the answer appears straight away.

Your answer

Percentage increase25%

Difference
20
Ratio (new / original)
1.25

The math behind it: Percentage Change

percentage change = (new - original) / original x 100

Increases and decreases are not symmetrical. A 25% rise from 80 gives 100, but getting from 100 back to 80 is only a 20% fall, because the starting value is different.

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