What is 80% of 400?

80% of 400 = 320

How to work it out

1. Convert the percentage to a decimal: 80 ÷ 100 = 0.8
2. Multiply by the number: 0.8 × 400 = 320

400 increased by 80% is 720; decreased by 80% it is 80 (useful for discounts).

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