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    Question

    A value is first raised by 15% and then reduced by 40%.

    What is the overall percentage change in the original value?
    A 21% Correct Answer Incorrect Answer
    B 45% Correct Answer Incorrect Answer
    C 31% Correct Answer Incorrect Answer
    D 19% Correct Answer Incorrect Answer

    Solution

    Let the original value be 100n Final value = 1.15 × 0.6 × 100n = 69n Therefore, percentage decrease = [(100n - 69n) ÷ 100n] × 100 = 31%

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