15 decreased by 80% = 3
15 decreased by 80 percent is 3. Step-by-step solution with the formula and worked example.
15 decreased by 80% = 3
decreased by %
Solution: 15 decreased by 80 percent
Decrease = 80% × 15 = 12
Result = 15 − 12 = 3
Result = 15 − 12 = 3
Step-by-step explanation
- Find the decrease: 80% of 15 = 12.
- Subtract it from the original: 15 − 12 = 3.
- Shortcut: multiply by (1 − 80/100) = ×0.2.
Good to know
Shortcut: decreasing by 80% is the same as multiplying by 0.2 (that is 100% − 80%). So 15 × 0.2 = 3 in one step.
Frequently asked questions
15 decreased by 80 percent
15 decreased by 80% = 3.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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