How do you find the percentage of a number?

To find the percentage of a number, multiply the number by the percentage fraction. For example, to find 20% of 500, calculate (20 / 100) × 500, which equals 100.

How to calculate percentage increase or decrease?

First, find the difference between the new value and the original value. Then, divide that difference by the original value. Finally, multiply by 100 to get the percentage change.

Is this percentage calculator free to use?

Yes, this percentage calculator is completely free, runs directly in your browser without reloading, and ensures your data remains private.

Home /
Calculators /
Discount Calculator

Percentage Calculator

Quickly calculate percentages, find out what percentage one number is of another, or calculate percentage growth (increase/decrease).

What do you want to calculate?

Value 1

Value 2

Result Summary

Answer

About Our Free Percentage Calculator

Percentages are used everywhere—from calculating discounts and taxes to figuring out exam grades and business growth. Our free online Percentage Calculator provides three different modes to solve any percentage-related math problem instantly. It operates entirely on your browser, ensuring lightning-fast results without any server delays.

Percentage Calculation Formulas

1. What is X% of Y?

Used for calculating discounts, tips, or specific shares.


                    Result = (X / 100) × Y

2. X is what % of Y?

Used for finding exam scores or completion ratios.


                    Result = (X / Y) × 100

3. % Increase/Decrease

Used to track growth, inflation, or profit margins.


                    Result = ((New - Old) / Old) × 100

Frequently Asked Questions

To find 20% of any number, you can simply multiply the number by 0.20. Alternatively, divide the number by 100 and then multiply the result by 20. Our calculator does this instantly using the "X% of Y" mode.

Select the "% Increase/Decrease" mode. Put the older year's value in the first box (Original Value) and the newer year's value in the second box (New Value). The tool will show you exactly how much your value has grown or shrunk in percentage.

Yes! The entire website is highly optimized for mobile devices. You can bookmark this tool on your smartphone for quick access while shopping or working.