# Percentage Calculator — Free Online Tool | Ibrahim Tools

> Free percentage calculator for discounts, tips, exam scores, and growth rates. Solve “X% of Y”, percentage change, and reverse percentages instantly.

Canonical: https://tools.ibrahimwali.com/percentage-calculator
Author: [Muhammad Ibrahim](https://ibrahimwali.com)

## How to use

1. Pick a calculation mode (percent of, change, or reverse).
2. Enter your numbers.
3. Get the answer instantly.
4. Copy the result if needed.

## Questions and limitations

### How do I calculate a discount?

Use “X% of Y” with the discount percent and original price, then subtract from the original — or use percentage decrease mode.

### What is percentage change?

Percentage change = ((new − old) / old) × 100. Positive means increase; negative means decrease.

## Guide

- [Percentage Calculator guide](https://tools.ibrahimwali.com/blog/percentage-calculator-guide)

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