Free calculator
Percentage Calculator
Three everyday percentage problems, solved instantly as you type.
Positive = increase, negative = decrease.
Percentages without the headache
Nearly every percentage question is one of these three shapes. "X% of Y" comes up in discounts and marks; "X is what % of Y" in scores and shares; "percent change" in prices, salaries and growth.
The classic trap is percentage points vs percent: a rise from 10% to 15% is 5 percentage points, but a 50% relative increase. Keep them straight and the numbers stay honest.
Percentage questions, answered
How do I find X percent of Y?
Multiply X by Y and divide by 100. For example, 15% of 200 is (15 × 200) ÷ 100 = 30.
How do I find what percent X is of Y?
Divide X by Y and multiply by 100. For example, 30 is (30 ÷ 200) × 100 = 15% of 200.
What is the difference between percent and percentage points?
A move from 10% to 15% is a 5-percentage-point rise, but a 50% relative increase. Mixing the two is one of the most common percentage mistakes.