Percentage Calculator
Calculate percentages: what is X% of Y, X is what % of Y, and percentage change.
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Calculate a percentage of a number
Frequently Asked Questions
How do I calculate what percentage one number is of another?
Divide the part by the whole and multiply by 100. For example, 25 is 50% of 50 because (25 / 50) x 100 = 50%.
How do I calculate percentage change?
Subtract the old value from the new value, divide by the absolute value of the old value, and multiply by 100. A change from 80 to 100 is a 25% increase.
What is the formula for percentage of a number?
To find X% of Y, multiply Y by X/100. For example, 15% of 200 is 200 x 0.15 = 30.