20 decreased by 90% = 2
20 decreased by 90 percent is 2. Step-by-step solution with the formula and worked example.
20 decreased by 90% = 2
decreased by %
Solution: 20 decreased by 90 percent
Decrease = 90% × 20 = 18
Result = 20 − 18 = 2
Result = 20 − 18 = 2
Step-by-step explanation
- Find the decrease: 90% of 20 = 18.
- Subtract it from the original: 20 − 18 = 2.
- 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 20 × 0.1 = 2 in one step.
Frequently asked questions
20 decreased by 90 percent
20 decreased by 90% = 2.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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