How to Calculate Percentages
Percentages are used everywhere — from shopping discounts and tax calculations to grades, tips, and data analysis. This calculator handles the three most common percentage calculations: finding a percentage of a number, determining what percent one number is of another, and calculating percentage change between two values.
No formulas to remember. Just enter your numbers and get instant results.
Frequently Asked Questions
How do I calculate what is X% of Y?
Enter the percentage and the number in the first calculator. For example, to find 15% of 200, enter 15 and 200 to get 30.
How do I find what percent X is of Y?
Use the second calculator. Enter the part and the whole number. For example, 30 is 15% of 200.
How do I calculate percentage change?
Use the third calculator. Enter the original value and new value to see the percentage increase or decrease. A change from 100 to 150 is a +50% increase.
What is the percentage formula?
The basic formula is: Percentage = (Part / Whole) × 100. For example, 30 out of 200 = (30/200) × 100 = 15%.
How do I convert a fraction to a percentage?
Divide the numerator by the denominator, then multiply by 100. Try our fraction to percentage converter for instant results.