# Percentage Calculator

This online percentage calculator will help you calculate percentages easily. Find the percentage of a sum, the percentage difference between two numbers, and increase or decrease a number by a percentage.

## 3-way percentage

What is x% of y?

What percent is x of y?

x is y% of what number?

## Percentage change

Find the percentage of increase or decrease between two numbers. The formula for calculation is:-

%_{change} = (Final value - Initial value) / Initial value * 100

## Increase a number by a percentage

T = S+S*P/100 = S(1+P/100)

This percentage addition calculator is useful for calculating price of a product including the sales tax, cost markup price and gratuity-tip amount.

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## Decrease a number by a percentage

D = S-S*P/100 = S(1-P/100)

This percentage subtraction calculator is especially useful for shoppers to calculate savings on discount sales and for retailers to set a selling price at a desired margin.

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