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JAMB Mathematics 1985 Question 12

Question 12

Commercial Arithmetic

22½% of the Nigerian naira is equal to 171/10% of a foreign currency M. What is the conversion rate of the M to the naira?

  1. A.1M = 15/57₦
  2. B.1M = 211/57₦
  3. C.1M = 118/57₦
  4. D.1M = 38¼₦
  5. E.1M = 384¾₦.
Show the answer and explanation

Answer: C (1M = 118/57₦)

Explanation

0.225 naira = 0.171 M, so 1 M = 0.225/0.171 = 225/171 = 1 54/171 = 1 18/57 naira.