Percentage Calculator
Free online percentage calculator: find X% of Y, what percent X is of Y, and percentage increase or decrease between two numbers.
1. What is X% of Y?
2. X is what % of Y?
3. % change from X to Y
About this tool
This percentage calculator solves the three most common percent problems in one page: what X% of Y is, what percent X is of Y, and the percentage increase or decrease between two values. Each step gives its answer instantly.
Use it to work out tips, discounts, grades and marks, salary raises, price changes, exam score percentages and growth rates — any calculation where a ratio out of one hundred is involved.
FAQ
How do I find 15% of 200?
Divide 15 by 100 to get 0.15, then multiply by 200: 0.15 x 200 = 30.
What is the formula for percentage increase?
Percentage increase = (new value - old value) / old value x 100. Negative results mean a decrease.
What is the difference between percentage change and difference?
Change uses the starting value as the base; difference uses the average of the two values. Change is far more common in school and finance.