AlgebraEasy–MediumOriginal value before a percent decrease
Algebra practice question
When a number is decreased by 12%, the result is 66. What is the original number?
Answer: 75
0.88n = 66 → n = 66 ÷ 0.88 = 75.
Common wrong answers
- If you answered 78
- 78 adds 12 to 66.
- If you answered 73.92
- 73.92 adds 12% of 66 instead of dividing by 0.88.
- If you answered 58.08
- 58.08 takes 12% off 66 again.
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