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Percentage Calculator

Fast, Simple & Free Online Calculator

Calculate percentages, percentage increases, decreases, and more with our free online percentage calculator.

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What is X% of Y?

Find a percentage of a number.

Percentage (%) Number

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X is what percentage of Y?

Find what percentage one number is of another.

Value (X) Total (Y)

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Percentage Increase

Calculate the percentage increase between two numbers.

Original Value New Value

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Percentage Decrease

Calculate the percentage decrease between two numbers.

Original Value New Value

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How to Calculate a Percentage

A percentage represents a number as a fraction of 100. Percentage calculations are commonly used for discounts, grades, statistics, finance, and everyday calculations.

Basic Percentage Formula

Percentage = (Part ÷ Whole) × 100

Example: What is 20% of 200?

(20 ÷ 100) × 200 = 40

Percentage Increase Formula

Percentage Increase = ((New Value − Original Value) ÷ Original Value) × 100

Percentage Decrease Formula

Percentage Decrease = ((Original Value − New Value) ÷ Original Value) × 100

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