How much 60% of 50 is greater than 40% of 30?
Correct answer: A. 18
- A. 18
- B. 13
- C. 15
- D. 20
Explanation
60% of 50 = 0.60 × 50 = 30, and 40% of 30 = 0.40 × 30 = 12. Thus, the first quantity is greater by 30 − 12 = 18. The likely mistake is option c, 15, caused by calculating one percentage incorrectly.
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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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