Quickly solve all your percentage-related math problems. Whether you need to find a percentage of a number or calculate a discount, our tool handles it in seconds.
To find what percentage one number is of another, use percentage = part ÷ whole × 100.
For a percentage increase, use (new − original) ÷ original × 100. For a decrease, use (original − new) ÷ original × 100.
To find a percentage of a number, multiply the number by the percentage expressed as a decimal.
To reverse a percentage change, divide by 1 plus the increase rate or 1 minus the decrease rate rather than simply reversing the percentage.
Use it for discounts, growth rates, markups, test scores, business metrics, and comparisons.
Percentage increase and decrease are relative to different starting values, so a 50% increase is not reversed by a 50% decrease.
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