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What is 90% of 80?
90% of 80 = 72
80 × 90/100 = 72

How to calculate 90% of 80

Multiply 80 by 90 and divide by 100: 80 × 90 ÷ 100 = 72. Equivalent shortcut: 80 × 0.9 = 72.

As a discount

A 90% discount on a 80 purchase saves you 72, so you pay 8. Stacking more discounts? Use the Discount & Tax Calculator — stacked discounts multiply, they don't add.

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