Percentage Calculator
Calculate percentages, percentage changes, percentage of total, and more — with instant results and clear explanations.
Frequently Asked Questions
Use 'X is what % of Y?'. Divide X by Y and multiply by 100. For example, 30 ÷ 200 × 100 = 15%. The tool calculates this instantly.
Use 'What is X% of Y?'. For example, 15% of 200 = 30. Multiply Y by (X/100).
Percentage change = ((New – Old) / |Old|) × 100. From 100 to 125 = +25% increase. From 100 to 75 = −25% decrease.
Use 'Add/Remove % of Value'. Enter the original price as 'Value' and the discount percentage. The tool shows both the discounted and marked-up prices.
How to Use This Percentage Calculator
- What is X% of Y? — Find a percentage of a number. E.g., 15% of 200 = 30.
- X is what % of Y? — Find what percentage one number is of another. E.g., 30 is 15% of 200.
- Percentage Change: Calculate increase or decrease. E.g., from 100 to 125 = +25% increase.
- Add/Remove %: Useful for discounts, tips, and tax calculations.