Percentage Calculator
Find a percentage of a number, percentage change, increase, decrease, difference, reverse percentages, discounts and tax.
Find a percentage of a number, percentage change, increase, decrease, difference, reverse percentages, discounts and tax.
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Covers the percentage questions that come up most often: a percentage of a number, what percentage one number is of another, percentage change, increases and decreases, the symmetric percentage difference, and reverse percentages.
Discount and tax modes show both the amount and the final price, so you can check a sale price or work back to a pre-tax amount.
Example
Percentage change from 80 to 100
→ +25%
Percentage change is measured relative to the starting value.
Percentage difference treats both values symmetrically, using their average as the base.
A reverse percentage undoes a change of p%.
Percentage change compares a new value with an old one, so direction matters (80 → 100 is +25%, 100 → 80 is −20%). Percentage difference compares two values with no “before” and “after”, dividing by their average.