Free Percentage of a Number Calculator — X% of Y
~15 seconds
Finding a percentage of a number is one of the most common everyday math tasks. Enter the percentage and the number to instantly calculate the result — whether you're working out a tip, a discount, or a test score.
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Examples
Calculating a tip
20% of $75
Calculation
- Convert percent to decimal: 20 / 100 = 0.20
- Multiply: 0.20 × $75 = $15
Result: $15.00
Exam score
85% of 120 total marks
Calculation
- Convert: 85 / 100 = 0.85
- Multiply: 0.85 × 120 = 102
Result: 102 marks