15 decreased by 10% = 13.5
15 decreased by 10 percent is 13.5. Step-by-step solution with the formula and worked example.
15 decreased by 10% = 13.5
decreased by %
Solution: 15 decreased by 10 percent
Decrease = 10% × 15 = 1.5
Result = 15 − 1.5 = 13.5
Result = 15 − 1.5 = 13.5
Step-by-step explanation
- Find the decrease: 10% of 15 = 1.5.
- Subtract it from the original: 15 − 1.5 = 13.5.
- 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 15 × 0.9 = 13.5 in one step.
Frequently asked questions
15 decreased by 10 percent
15 decreased by 10% = 13.5.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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