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      Question

      A quantity is increased by 60% at first, and later

      decreased by 45%. Calculate the net percentage change.
      A 15% increase Correct Answer Incorrect Answer
      B 12% decrease Correct Answer Incorrect Answer
      C 10% increase Correct Answer Incorrect Answer
      D 18% decrease Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the quantity be '100b'

      Final quantity = 1.60 × 0.55 × 100b = '88b'

      Required percentage decrease = [(100b - 88b) ÷ 100b] × 100 = 12%

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