What is 45% of 20?

45% of 20 = 9

How to work it out

1. Convert the percentage to a decimal: 45 ÷ 100 = 0.45
2. Multiply by the number: 0.45 × 20 = 9

20 increased by 45% is 29; decreased by 45% it is 11 (useful for discounts).

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