What is 15% of 40?

15% of 40 = 6

How to work it out

1. Convert the percentage to a decimal: 15 ÷ 100 = 0.15
2. Multiply by the number: 0.15 × 40 = 6

40 increased by 15% is 46; decreased by 15% it is 34 (useful for discounts).

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