Free Percentage Calculator Online | Microapp
Calculate percentages three ways: find X% of a number, find what percent X is of Y, or calculate the percentage change between two values.
The Percentage Calculator is a versatile online tool designed to simplify all your percentage-related calculations. Whether you need to find a percentage of a number, determine what percentage one number is of another, or calculate the percentage change between two values, this tool provides instant and accurate results. Ideal for students, professionals, and anyone needing quick percentage solutions.
What is X% of Y?
How Percentage Calculations Work
A percentage is a way of expressing a number as a fraction of 100. The word comes from the Latin 'per centum', meaning 'by the hundred'. Percentages are used everywhere — from calculating discounts and tax rates to expressing test scores and investment returns. There are three core percentage problems: finding X% of Y, finding what percentage X is of Y, and finding the percentage change between two values.
Three Core Calculations Explained
1. What is 15% of $85? → 85 × 0.15 = $12.75. 2. 45 is what percent of 180? → (45 ÷ 180) × 100 = 25%. 3. A price went from $40 to $52 — what is the percentage increase? → ((52 − 40) ÷ 40) × 100 = 30%.
Common Percentage Quick Reference
| Percentage | Fraction | Decimal | Quick Trick |
|---|---|---|---|
| 10% | 1/10 | 0.10 | Divide by 10 |
| 20% | 1/5 | 0.20 | Divide by 5 |
| 25% | 1/4 | 0.25 | Divide by 4 |
| 33.3% | 1/3 | 0.333 | Divide by 3 |
| 50% | 1/2 | 0.50 | Divide by 2 |
| 75% | 3/4 | 0.75 | Multiply by 0.75 |
How to use this tool
- 1Select the desired calculation mode: 'X% of Y', 'X is what % of Y', or 'Percentage change'.
- 2Enter the required numerical values into the input fields based on the selected mode.
- 3The result will automatically display below the input fields.
- 4Click the 'Copy' button to quickly copy the calculated percentage to your clipboard.
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