20 decreased by 10% = 18
20 decreased by 10 percent is 18. Step-by-step solution with the formula and worked example.
20 decreased by 10% = 18
decreased by %
Solution: 20 decreased by 10 percent
Decrease = 10% × 20 = 2
Result = 20 − 2 = 18
Result = 20 − 2 = 18
Step-by-step explanation
- Find the decrease: 10% of 20 = 2.
- Subtract it from the original: 20 − 2 = 18.
- Shortcut: multiply by (1 − 10/100) = ×0.9.
Good to know
Shortcut: decreasing by 10% is the same as multiplying by 0.9 (that is 100% − 10%). So 20 × 0.9 = 18 in one step.
Frequently asked questions
20 decreased by 10 percent
20 decreased by 10% = 18.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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