Percentage Calculator
Percentage Calculator is a free online tool to calculate percentages.
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How to Calculate Percentages
Finding a Percentage of a Number
To find X% of Y, multiply Y by X and divide by 100:
Result = (X ÷ 100) × YExample: 15% of 200 = (15 ÷ 100) × 200 = 30
Finding What Percent One Number is of Another
To find what percent X is of Y:
Percentage = (X ÷ Y) × 100Example: 25 is what % of 80? = (25 ÷ 80) × 100 = 31.25%
Calculating Percentage Change
To find the percentage change from A to B:
% Change = ((B - A) ÷ A) × 100Example: 50 to 75 = ((75 - 50) ÷ 50) × 100 = 50% increase
Frequently Asked Questions
How do I calculate a percentage of a number?
To calculate a percentage of a number, multiply the number by the percentage and divide by 100. For example, to find 25% of 80: (25 × 80) ÷ 100 = 20.
How do I calculate percentage increase?
To calculate percentage increase: ((New Value - Original Value) ÷ Original Value) × 100. For example, if a price goes from $50 to $75: ((75-50) ÷ 50) × 100 = 50% increase.
How do I calculate percentage decrease?
To calculate percentage decrease: ((Original Value - New Value) ÷ Original Value) × 100. For example, if a price drops from $100 to $80: ((100-80) ÷ 100) × 100 = 20% decrease.
What is the difference between percentage change and percentage difference?
Percentage change measures the change from one value to another (with a clear "before" and "after"). Percentage difference compares two values without specifying which is the reference point, using their average as the base.
How do I convert a fraction to a percentage?
To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100. For example, 3/4 = (3 ÷ 4) × 100 = 75%.