What is 10% of 400?

10% of 400 = 40

Formula: 400 × 10 ÷ 100 = 40. Or work it out as 10 hundredths: 1% of 400 is 4, so 10% is 4 × 10 = 40.

• 400 − 10% = 360 (for example a 10% discount)
• 400 + 10% = 440 (for example adding 10% tax or a tip)
• 40 is 10% of 400

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

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