Percentage Calculator
Answers to three common percentage questions in one place — marks, discounts, salary increases, tax, or any calculation. The result updates live as you type the numbers.
1. What is X% of Y?
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Formula: (X ÷ 100) × Y
2. X is what % of Y?
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Formula: (X ÷ Y) × 100 — example: exam marks 450 out of 600 = 75%.
3. % Increase / Decrease from X to Y
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Formula: ((Y − X) ÷ X) × 100. Difference: —
How to use
- Choose your question — there are three calculators above.
- Enter the numbers in the relevant boxes (X and Y).
- The result shows live right away — no need to press any button.
- Change the numbers and the result updates by itself.
Tips
- Use the first mode for discounts, tips and tax on a price.
- Use the second mode to find your exam percentage from marks obtained.
- Use the third mode to compare two values, like a price before and after a change.