Percentage Calculator

To find what percentage one number is of another, divide the first number by the second and multiply by 100. For example: 25 is what % of 200? (25 ÷ 200) × 100 = 12.5%. Use the 'Difference' tab to calculate this automatically.

To calculate a percentage increase, multiply the original value by the percentage (as a decimal) and add it to the original. For example: 100 increased by 20% = 100 + (100 × 0.20) = 120. Use the 'Increase' tab for instant results.

To calculate a discount, multiply the original price by the discount percentage (as a decimal) and subtract from the original. For example: $100 with 25% off = 100 - (100 × 0.25) = $75. Use the 'Decrease' tab to calculate discounts instantly.

Percentage increase is relative to the original value, while percentage point is an absolute difference. For example: if interest goes from 5% to 8%, that's a 60% increase (3/5 × 100) but a 3 percentage point increase. This calculator shows percentage increase.

Use the 'Basic %' tab. Enter the tip percentage (15%, 18%, 20%, etc.) and your bill amount. The result shows exactly how much to tip. For the total including tip, use the 'Increase' tab.

Yes! Use the 'Basic %' tab to calculate tax amount (e.g., 8.5% of $100 = $8.50), or use the 'Increase' tab to get the total price including tax (e.g., $100 + 8.5% = $108.50).

The calculator provides results accurate to 2 decimal places, which is sufficient for financial calculations, grades, discounts, and most real-world applications. All calculations use standard mathematical formulas.