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WAEC Mathematics 2005 Question 36

Question 36

Commercial Arithmetic

The salary of a man was increased in the ratio 40:47. Calculate the percentage increase in the salary.

  1. A.85.1%
  2. B.58.5%
  3. C.17.5%
  4. D.14.9%
Show the answer and explanation

Answer: C (17.5%)

Explanation

The increase is 7 parts on 40: 7/40 × 100% = 17.5%.