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WBCS Main Examination 2023 — Paper VI: Arithmetic and Test of Reasoning · Question 183 of 200

Q183
ArithmeticPercentage, Profit & Loss
Price of an article increases by 20%. As a result turnover increases by 12%. Find the decrease in quantity sold.
  1. a.5%
  2. b.6·67%
  3. c.6·66%
  4. d.5·67%

Answer: (B) 6·67%

Turnover = price × quantity, so quantity = 1·12 ÷ 1·20 = 0·9333 of the original. The decrease is $6\frac{2}{3}$%, which rounds to 6·67%. 6·66% cuts off the recurring 6 instead of rounding it, and 5% and 5·67% are too small.