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      Question

      A quantity is first increased by 60% and then decreased

      by 25%. Calculate the overall percentage increase or decrease.
      A 24% increase Correct Answer Incorrect Answer
      B 10% decrease Correct Answer Incorrect Answer
      C 20% increase Correct Answer Incorrect Answer
      D 12% decrease Correct Answer Incorrect Answer

      Solution

      ATQ,

      Let the quantity be 100b

      Final quantity = 1.60 Γ— 0.75 Γ— 100b = 120b

      Overall percentage change = [(120b - 100b) Γ· 100b] Γ— 100 = 20% increase

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