20 decreased by 55% = 9
20 decreased by 55 percent is 9. Step-by-step solution with the formula and worked example.
20 decreased by 55% = 9
decreased by %
Solution: 20 decreased by 55 percent
Decrease = 55% × 20 = 11
Result = 20 − 11 = 9
Result = 20 − 11 = 9
Step-by-step explanation
- Find the decrease: 55% of 20 = 11.
- Subtract it from the original: 20 − 11 = 9.
- Shortcut: multiply by (1 − 55/100) = ×0.45.
Good to know
Shortcut: decreasing by 55% is the same as multiplying by 0.45 (that is 100% − 55%). So 20 × 0.45 = 9 in one step.
Frequently asked questions
20 decreased by 55 percent
20 decreased by 55% = 9.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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