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    Question

    The cost of tea increased by 25%, so Meena reduced her

    consumption by 20%. Calculate the percentage change in her expenditure on tea.
    A 10% decrease Correct Answer Incorrect Answer
    B 12% increase Correct Answer Incorrect Answer
    C 16% decrease Correct Answer Incorrect Answer
    D No change Correct Answer Incorrect Answer

    Solution

    ATQ,

    Let initial tea price be Rs. 100a and initial consumption be 100b grams

    Initial expenditure = 100a × 100b = Rs. 10000ab

    New expenditure = (1.25 × 100a) × (0.80 × 100b) = Rs. 10000ab

    Required percent = [(10000ab - 10000ab) ÷ 10000ab] × 100 = 0% (no change)

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