What is 10 percent of 400?
10% of 400 is 40. See the step-by-step working, plus 400 increased and decreased by 10%.
10% of 400 = 40
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Full breakdown
| 10% of 400 | 40 |
| 400 + 10% | 440 |
| 400 − 10% | 360 |
| 400 is what % of 40 | 1,000% |
Step-by-step working
- Convert the percentage to a decimal: 10 ÷ 100 = 0.1
- Multiply by the number: 0.1 × 400 = 40
X% of Y = (X ÷ 100) × Y
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