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    Question

    X and Y are two numbers. Their average is 315, and the

    sum of X and Y is 180% of X. What percentage of X is the difference between X and Y?
    A 22% Correct Answer Incorrect Answer
    B 20% Correct Answer Incorrect Answer
    C 29% Correct Answer Incorrect Answer
    D 18% Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ;

    Since X + Y = 180% of X

    So, X : Y = 5 : 4

    (X − Y) : X = 1 : 5

    Therefore,

    1/5 × 100% = 20%

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