Percentage of a Number
What is X% of Y? Enter any percentage and number.
Quick examples
What is
%
of?Formula
Result = Number × (Percentage ÷ 100)
| Question | Formula | Example |
|---|---|---|
| What is X% of Y? | Y × (X ÷ 100) | 20% of 80 = 80 × 0.20 = 16 |
| X is what % of Y? | (X ÷ Y) × 100 | 16 is what % of 80? → (16÷80)×100 = 20% |
| X is Y% of what? | X ÷ (Y ÷ 100) | 16 is 20% of what? → 16÷0.20 = 80 |
Common Uses
Restaurant tip
15–20% of bill
Sales tax
5–10% of purchase
Investment return
% gain × principal
Discount
% off × original price
Body fat
% × body weight
Commission
% × total sale