40 is subtracted from 60% of a number, the result is 50. Find the number?
Correct answer: A. 150
- A. 150
- B. 140
- C. 130
- D. 110
Explanation
Let the number be N. The statement gives 60% of N minus 40 = 50, so 0.60N = 90 and N = 90 / 0.60 = 150. The likely mistake is adding 40 to 50 but then treating 60% as 60 rather than 0.60, which can produce an incorrect option.
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About Percentages
Percentages express a quantity as parts per hundred and support calculations involving increases, decreases, discounts, commissions, taxes, and successive changes. Questions require distinguishing percentage change from percentage points and identifying the original value when a final value and its percentage change are given.
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