Question
Tim spends 22% of his monthly income in travelling. He
spends 25% of his monthly income on household expenses and spends 36% of his monthly income on families medical expenses. He has remaining amount of Rs. 12750 as cash with him. What is Tim's annual income?        ÂSolution
Let Tim's monthly income be Rs. 100.          Total expenditure = (22 + 25 + 36)% = 83%           ∴  Savings = (100 – 83)% `xx` 100 = Rs. 17         Now, 17 : 100 : : 12750 : x           ⇒   x = `(100 xx 12750)/17` = Rs. 75000        Tim's monthly income = Rs. 75000         ∴  Tim's annual income = Rs. 12 × 75000  = Rs. 900000
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