General
Percentage Decrease Calculator
Calculate the percentage decrease between two numbers, and what a value becomes after a given reduction.
Result
A decrease and the increase required to reverse it are never the same percentage, because they are measured from different bases.
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About this calculator
Why is the recovery percentage bigger than the drop?
The drop is measured against the higher original figure and the recovery against the lower one. A 20% fall needs a 25% rise to get back to where it started.
How do I take a discount off a price?
Multiply by 1 minus the discount as a decimal. 15% off $480 is 480 × 0.85 = $408.
Can a decrease be more than 100%?
Only if the value goes negative. For a price or quantity that cannot fall below zero, the maximum possible decrease is 100%.
The formula
(original − new) ÷ original × 100 = % decrease
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