80 decreased by 90% = 8
80 decreased by 90 percent is 8. Step-by-step solution with the formula and worked example.
80 decreased by 90% = 8
decreased by %
Solution: 80 decreased by 90 percent
Decrease = 90% × 80 = 72
Result = 80 − 72 = 8
Result = 80 − 72 = 8
Step-by-step explanation
- Find the decrease: 90% of 80 = 72.
- Subtract it from the original: 80 − 72 = 8.
- Shortcut: multiply by (1 − 90/100) = ×0.1.
Good to know
Shortcut: decreasing by 90% is the same as multiplying by 0.1 (that is 100% − 90%). So 80 × 0.1 = 8 in one step.
Frequently asked questions
80 decreased by 90 percent
80 decreased by 90% = 8.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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