Find the percentage increase between an original value and a new value, including the absolute change.
increase % = ((new − original) ÷ |original|) × 100
A price rises from $80 to $100. The change is $20, so the increase is 20 ÷ 80 × 100 = 25%.
Percentage increase compares a new value with the original and expresses the growth relative to where you started. A $20 rise means something very different on an $80 item than on an $800 item.
If the new value is smaller than the original, the result is negative — which is really a decrease. Use the percentage decrease calculator when you specifically want decreases shown as positive percentages.
They use different bases. Going from 80 to 100 is a 25% increase, but going back from 100 to 80 is only a 20% decrease, because the second calculation divides by 100.
Yes. Doubling a value is a 100% increase; tripling it is a 200% increase.
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