If 25% of x is 15 less than 15% of 1500, then x is?
Correct answer: D. 840
- A. 720
- B. 750
- C. 820
- D. 840
- E. None of these
Explanation
15% of 1500 = 0.15 x 1500 = 225. Since 25% of x is 15 less, 0.25x = 225 - 15 = 210, so x = 210 ÷ 0.25 = 840. The likely trap is 720, which results from subtracting 15 from the wrong percentage quantity.
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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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