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    Question

    A person saves 30% of his monthly income. If his monthly

    is increased by 45% and he still saves the same amount as before then find percentage increase (approximate) in his monthly expenditure.
    A 64.3% Correct Answer Incorrect Answer
    B 53.3% Correct Answer Incorrect Answer
    C 67.3% Correct Answer Incorrect Answer
    D 70.3% Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let monthly of person is Rs. 100x Monthly savings = 0.30 times; 100x = Rs. 30x Monthly expenditure = 100x ndash; 30x = Rs. 70x His increased monthly income = 1.45 times; 100x = Rs. 145x His monthly expenditure now = 145x ndash; 30x = 115x Percentage increase in expenditure = [(115x ndash; 70x)/70x] times; 100 ~ 64.3%

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