Percentage Calculator
Find a percentage of a value, work out what percentage one number is of another, or calculate the percentage change between two numbers.
How to use
- 1
Pick a mode: percentage of a value, value as a percentage of another, change between two values, or increase/decrease by a percentage.
- 2
Type the numbers. The preset buttons (5%, 10%, 15%, etc.) fill the percentage field instantly for common cases.
- 3
The result updates as you type. No submit button.
- 4
Switch modes any time to ask the question a different way.
Frequently asked questions
Multiply the number by the percentage, then divide by 100. 20% of 500 = (500 × 20) ÷ 100 = 100. Or with decimals: 500 × 0.20 = 100.
Divide the first number by the second, then multiply by 100. 80 out of 200 = (80 ÷ 200) × 100 = 40%. Useful for grades, fraction-to-percentage, and score-out-of-total questions.
Take the new value, subtract the old value, divide by the old value, multiply by 100. (105 − 100) ÷ 100 × 100 = 5% increase. (90 − 100) ÷ 100 × 100 = −10% (a decrease).
If interest goes from 4% to 6%, that's a 2 percentage-point increase but a 50% increase (because 6 is 50% bigger than 4). News headlines often mix these up. When the units are themselves percentages, say 'points'; when comparing relative size, say 'percent'.
If a final price is AED 80 after a 20% discount, the original price is 80 ÷ (1 − 0.20) = AED 100. The pattern: original = final ÷ (1 ± percentage as decimal). Use the 'increase/decrease' mode in reverse.
Yes. For UAE 5% VAT, set mode to 'increase' with 5%. For a 15% tip at a restaurant, same mode with 15%. For the VAT-only portion of a gross figure, use the dedicated UAE VAT calculator for cleaner output.
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Source: Standard arithmetic · Last verified 2026-06. This tool provides estimates only and is not legal, tax or financial advice. Always verify your specific situation with the relevant UAE authority or a licensed advisor before taking action.