400 decreased by 20% = 320
400 decreased by 20 percent is 320. Step-by-step solution with the formula and worked example.
400 decreased by 20% = 320
decreased by %
Solution: 400 decreased by 20 percent
Decrease = 20% × 400 = 80
Result = 400 − 80 = 320
Result = 400 − 80 = 320
Step-by-step explanation
- Find the decrease: 20% of 400 = 80.
- Subtract it from the original: 400 − 80 = 320.
- Shortcut: multiply by (1 − 20/100) = ×0.8.
Good to know
Shortcut: decreasing by 20% is the same as multiplying by 0.8 (that is 100% − 20%). So 400 × 0.8 = 320 in one step.
Frequently asked questions
400 decreased by 20 percent
400 decreased by 20% = 320.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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