15 decreased by 40% = 9
15 decreased by 40 percent is 9. Step-by-step solution with the formula and worked example.
15 decreased by 40% = 9
decreased by %
Solution: 15 decreased by 40 percent
Decrease = 40% × 15 = 6
Result = 15 − 6 = 9
Result = 15 − 6 = 9
Step-by-step explanation
- Find the decrease: 40% of 15 = 6.
- Subtract it from the original: 15 − 6 = 9.
- Shortcut: multiply by (1 − 40/100) = ×0.6.
Good to know
Shortcut: decreasing by 40% is the same as multiplying by 0.6 (that is 100% − 40%). So 15 × 0.6 = 9 in one step.
Frequently asked questions
15 decreased by 40 percent
15 decreased by 40% = 9.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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