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A man spend Rs. 3300. This was 75% of his monthly income. His monthly income is__________?

Correct answer: B. 4400

  • A. 4000
  • B. 4400
  • C. 5000
  • D. 5400

Explanation

Rs. 3300 is 75% of the monthly income, so the full income is Rs. 3300 / 0.75 = Rs. 4400. Equivalently, 75% means three-fourths, so Rs. 3300 x 4 / 3 = Rs. 4400. The likely trap is Rs. 5000, which comes from treating the remaining 25% as the amount spent rather than recognising that Rs. 3300 is 75%.

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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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