Question
Monthly income of A is Rs. 9000 and he saves 30% of his
monthly income. If monthly expenditure of A is decreased by 35% while his monthly savings is increased by 35% then find the increase or decrease in his monthly income.Solution
Monthly savings and expenditure of A initially is Rs. 2700 and Rs. 6300, respectively. Monthly expenditure of A now = 0.65 × 6300 = Rs. 4095 Monthly savings of A now = 1.35 × 2700 = Rs. 3645 Monthly income of A now = 4095 + 3645= Rs. 7740 Desired percentage decrease = [(9000 – 7740)/9000] × 100 = 14%
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