CalculatorPercentage calculator
Four everyday percent questions, each answered as you type, with the formula under every answer so you can check it.
- Percent of a number: 20% of 85 is 17.
- What percent one number is of another, and percent increase or decrease.
- A sale price with the discount taken off, then sales tax added on.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
- Size 24 KB
Try an example
- 15% of 60A quick tip
- 45 out of 60A test score as a percent
- Rent from 1,450 to 1,525How much it went up
- $129.99, 30% off, 7.25% taxWhat the sale really costs
- 8% of 250,000A down payment
- From 120 down to 90A price drop
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Questions
How do I work out a percentage of a number?
Multiply the number by the percent, then divide by 100. 20% of 85 is 20 × 85 ÷ 100 = 17.
How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. 17 out of 85 is 17 ÷ 85 × 100 = 20%.
How is percent change worked out?
Take the old value from the new one, divide by the old value, and multiply by 100. From 80 to 100 is (100 − 80) ÷ 80 × 100 = 25% more.
Is the sales tax added before or after the discount?
After. The tax is worked out on the sale price, the way most US stores ring it up. The answers are arithmetic, not tax or financial advice.
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