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    Question

    A quantity is increased by 25% and afterward decreased by

    10%. What is the overall percentage change in the original quantity?
    A 21.5% Correct Answer Incorrect Answer
    B 17.5% Correct Answer Incorrect Answer
    C 13.5% Correct Answer Incorrect Answer
    D 12.5% Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the quantity be '100b'

    Final quantity = 1.25 × 0.9 × 100b = '112.5b'

    Required percentage increase = [(112.5b - 100b) ÷ 100b] × 100 = 12.5%

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