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    Question

    First, a number is increased by 52%, and then it is

    decreased by 45%. Determine the net percentage increase or decrease.
    A 23.2% increase Correct Answer Incorrect Answer
    B 16.4% decrease Correct Answer Incorrect Answer
    C 21.5% increase Correct Answer Incorrect Answer
    D 12.5% decrease Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the number be 100b

    Final number = 1.52 × 0.55 × 100b = 83.6b

    Net percentage change = [(83.6b - 100b) ÷ 100b] × 100 = -16.4% or

    16.4% decrease

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