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Percentage Calculator
✦ ProThree handy percentage calculations in one place. Find percentages, reverse-calculate, and compare changes.
What is X% of Y?
What is% of?
Result
30
15% × 200 = 30
Quick: common percentages of 200
Frequently Asked Questions
How do I calculate X% of a number?
Multiply the number by the percentage, then divide by 100. For example, 15% of 200 = (200 × 15) ÷ 100 = 30. Our calculator does this instantly — just enter the percentage and the number.
How do I find what percentage one number is of another?
Divide the part by the whole, then multiply by 100. For example, to find what percent 25 is of 200: (25 ÷ 200) × 100 = 12.5%. Use the "X is what % of Y" mode in our calculator.
How do I calculate percentage change?
Subtract the old value from the new value, divide by the old value, and multiply by 100. Formula: ((New − Old) ÷ Old) × 100. For example, going from 80 to 100 is a 25% increase.
What is the difference between percentage change and percentage difference?
Percentage change compares a new value to an original value (has a direction — increase or decrease). Percentage difference compares two values without an implied direction, using their average as the base.
How do I convert a fraction to a percentage?
Divide the numerator by the denominator, then multiply by 100. For example, 3/4 = 0.75 × 100 = 75%. You can use our percentage calculator by entering 3 as the part and 4 as the whole.
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