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    Question

    Sanjay saves 40% of his monthly income. If his monthly

    income increases by 12% while his monthly savings remain the same, find the increase in his monthly expenditure.
    A 20% Correct Answer Incorrect Answer
    B 60% Correct Answer Incorrect Answer
    C 35% Correct Answer Incorrect Answer
    D 70% Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let the monthly income of Sanjay be Rs. 100x.

    So, monthly savings of Sanjay = 0.40 × 100x = Rs. 40x

    Monthly expenditure of Sanjay = 100x – 40x = Rs. 60x

    Monthly income of Sanjay after increase = 1.12 × 100x = Rs. 112x

    Monthly expenditure of Sanjay after increase = 112x – 40x = 72x

    Desired percentage = [(72x – 60x)/60x] × 100 = 20%

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