Use our free and easy online percentage calculator to solve common problems like "What is X percent of Y?" or "How to calculate percentage increase or decrease." Perfect for students, professionals, and anyone needing quick math help.
What is X percent of Y Calculator
Calculate a percentage of a given number (e.g., 20% of 150 is 30).
Find What Percent One Number Is of Another
Find the percentage one number is of another (e.g., 25 is what percent of 200? The answer is 12.5%).
Percentage Increase or Decrease Calculator
Calculate the percentage change between two numbers (e.g., from 100 to 120 is a 20% increase).
Reverse Percentage Calculator – Find the Whole
If a value is a certain percentage of the whole, what is the whole? (e.g., if 10 is 20% of a number, the number is 50)