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WAEC Mathematics 2015 Question 10

Question 10

Fractions, Decimals and Approximation

If m = 4, n = 9 and r = 16, evaluate m/n − 17/9 + n/r

  1. A.15/16
  2. B.11/16
  3. C.5/16
  4. D.−37/48
Show the answer and explanation

Answer: D (−37/48)

Explanation

4/9 − 16/9 + 9/16 = −4/3 + 9/16 = (−64 + 27)/48 = −37/48.