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Percentage Calculator
Find a percent of a number, work out a percent increase or decrease, or see what percent one number is of another. Free, with no sign-up.
Example filled in: 15% of 200 is 30; 50 to 75 is a 50% increase; 30 is 15% of 200.
Your percentages
Results appear here as you type.
How to use the percentage calculator
- For "what is X% of Y", type the percent and the number — for example, 15% of 200.
- For a percent change, type the starting number and the ending number — for example, a price going from 50 to 75.
- For "what percent is X of Y", type the part and the whole — for example, 30 out of 200.
- All three answers update as you type, in the panel on the right.
Worked examples — checked against the calculator
What is 15% of 200? Multiply 200 by 15 and divide by 100: 200 × 0.15 = 30. What is the percent change from 50 to 75? The change is 25, and 25 divided by 50 is 0.5 — a 50% increase. What percent is 30 of 200? Divide 30 by 200 and multiply by 100: 30 ÷ 200 × 100 = 15%. Put the same numbers into the calculator above and you will get the same answers.
Frequently asked questions
What is 15% of 200?
15% of 200 is 30. Multiply 200 by 0.15 — or work out 10% (20) plus 5% (10) and add them together.
How do I work out a percent increase?
Take the new number minus the old number, divide by the old number, and multiply by 100. From 50 to 75, that is (75 − 50) ÷ 50 × 100 = 50%.
What percent is 30 of 200?
30 is 15% of 200. Divide 30 by 200 to get 0.15, then multiply by 100.
How do I work out a discount in percent?
Take the sale price off the list price, divide by the list price, and multiply by 100. A $200 item down to $150 is (200 − 150) ÷ 200 × 100 = 25% off.
What is the difference between a percent and a percentage point?
A percent is a share of something; a percentage point is the plain gap between two percents. Going from 15% to 20% is a 5-percentage-point rise, but a 33.3% increase in the rate itself.
Sources and method. Standard percentage maths. Worked examples checked in Node: 15% of 200 = 30; 50 to 75 = 50% increase; 30 of 200 = 15%.