30 decreased by 10% = 27
30 decreased by 10 percent is 27. Step-by-step solution with the formula and worked example.
30 decreased by 10% = 27
decreased by %
Solution: 30 decreased by 10 percent
Decrease = 10% × 30 = 3
Result = 30 − 3 = 27
Result = 30 − 3 = 27
Step-by-step explanation
- Find the decrease: 10% of 30 = 3.
- Subtract it from the original: 30 − 3 = 27.
- 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 30 × 0.9 = 27 in one step.
Frequently asked questions
30 decreased by 10 percent
30 decreased by 10% = 27.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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