30 decreased by 75% = 7.5
30 decreased by 75 percent is 7.5. Step-by-step solution with the formula and worked example.
30 decreased by 75% = 7.5
decreased by %
Solution: 30 decreased by 75 percent
Decrease = 75% × 30 = 22.5
Result = 30 − 22.5 = 7.5
Result = 30 − 22.5 = 7.5
Step-by-step explanation
- Find the decrease: 75% of 30 = 22.5.
- Subtract it from the original: 30 − 22.5 = 7.5.
- Shortcut: multiply by (1 − 75/100) = ×0.25.
Good to know
Shortcut: decreasing by 75% is the same as multiplying by 0.25 (that is 100% − 75%). So 30 × 0.25 = 7.5 in one step.
Frequently asked questions
30 decreased by 75 percent
30 decreased by 75% = 7.5.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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