What is 10% of 40?

10% of 40 = 4

Formula: 40 × 10 ÷ 100 = 4. Or work it out as 10 hundredths: 1% of 40 is 0.4, so 10% is 0.4 × 10 = 4.

• 40 − 10% = 36 (for example a 10% discount)
• 40 + 10% = 44 (for example adding 10% tax or a tip)
• 4 is 10% of 40

Any other numbers? Use the percentage calculator, the discount calculator or the percent change calculator.

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