40 decreased by 80% = 8
40 decreased by 80 percent is 8. Step-by-step solution with the formula and worked example.
40 decreased by 80% = 8
decreased by %
Solution: 40 decreased by 80 percent
Decrease = 80% × 40 = 32
Result = 40 − 32 = 8
Result = 40 − 32 = 8
Step-by-step explanation
- Find the decrease: 80% of 40 = 32.
- Subtract it from the original: 40 − 32 = 8.
- Shortcut: multiply by (1 − 80/100) = ×0.2.
Good to know
Shortcut: decreasing by 80% is the same as multiplying by 0.2 (that is 100% − 80%). So 40 × 0.2 = 8 in one step.
Frequently asked questions
40 decreased by 80 percent
40 decreased by 80% = 8.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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