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What is 30% of 100?
30% of 100 = 30
100 × 30/100 = 30

How to calculate 30% of 100

Multiply 100 by 30 and divide by 100: 100 × 30 ÷ 100 = 30. Equivalent shortcut: 100 × 0.3 = 30.

As a discount

A 30% discount on a 100 purchase saves you 30, so you pay 70. Stacking more discounts? Use the Discount & Tax Calculator — stacked discounts multiply, they don't add.

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