Percentage change calculator
Find the percentage change between two numbers.
About this calculator
Enter the starting value and the new value. The calculator shows whether it went up or down and by what percentage. The formula is (new − old) ÷ old × 100.
A rise from 80 to 100 is a 25% increase, but a fall from 100 to 80 is only a 20% decrease, because the starting number is different.
Common questions
What is the formula for percentage change?
Subtract the old value from the new value, divide by the old value, then multiply by 100.
Why can it be more than 100%?
A number that more than doubles has risen by more than 100%.
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