Percentage Calculator
Calculate percentages, percentage change, and what percent one number is of another.
15% of 200
30
15 is what percent of 200
7.5%
What is this tool?
A Percentage Calculator helps you solve the most common percentage problems: finding a percentage of a number, working out what percent one number is of another, and computing percentage change.
How does it work?
Each mode applies the standard percentage formula. For example, X% of Y equals (X أ· 100) أ— Y.
How to use Percentage Calculator
- Pick the calculation mode you need.
- Enter your numbers.
- Read the result instantly.
Common Use Cases
- Discounts and sales
- Tips and taxes
- Grades and statistics
Examples
- 20% of 150 is 30.
- Going from 80 to 100 is a 25% increase.
Pro Tips
- Use percentage change to compare growth between two values.
Frequently Asked Questions
How do I calculate what percent one number is of another?
Divide the part by the whole and multiply by 100. This tool does it instantly for you.
Can it calculate percentage increase and decrease?
Yes. Enter the original and new values to get the percentage change.