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12 decreased by 25% = 9

12 decreased by 25 percent is 9. Step-by-step solution with the formula and worked example.

12 decreased by 25% = 9
decreased by %

Solution: 12 decreased by 25 percent

Decrease = 25% × 12 = 3
Result = 12 − 3 = 9

Step-by-step explanation

  1. Find the decrease: 25% of 12 = 3.
  2. Subtract it from the original: 12 − 3 = 9.
  3. Shortcut: multiply by (1 − 25/100) = ×0.75.

Good to know

Shortcut: decreasing by 25% is the same as multiplying by 0.75 (that is 100% − 25%). So 12 × 0.75 = 9 in one step.

Frequently asked questions

12 decreased by 25 percent
12 decreased by 25% = 9.

How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.

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