What is 90% of 80?

90% of 80 = 72

How to work it out

1. Convert the percentage to a decimal: 90 ÷ 100 = 0.9
2. Multiply by the number: 0.9 × 80 = 72

80 increased by 90% is 152; decreased by 90% it is 8 (useful for discounts).

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