20 decreased by 45% = 11
20 decreased by 45 percent is 11. Step-by-step solution with the formula and worked example.
20 decreased by 45% = 11
decreased by %
Solution: 20 decreased by 45 percent
Decrease = 45% × 20 = 9
Result = 20 − 9 = 11
Result = 20 − 9 = 11
Step-by-step explanation
- Find the decrease: 45% of 20 = 9.
- Subtract it from the original: 20 − 9 = 11.
- Shortcut: multiply by (1 − 45/100) = ×0.55.
Good to know
Shortcut: decreasing by 45% is the same as multiplying by 0.55 (that is 100% − 45%). So 20 × 0.55 = 11 in one step.
Frequently asked questions
20 decreased by 45 percent
20 decreased by 45% = 11.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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