Question
A person who spends 55% of his salary saves the
remainder. His salary goes up by 15%, but his savings stay the same, and he now spends Rs. 3,300 more. Determine his initial salary.Solution
ATQ,  Let, the initial salary of the person be Rs. '100x'.  Initial expenditure of the person = 0.55 X 100x = Rs. '55x'  Initial savings of the person = 100x - 55x = Rs. '45x'  New salary of the person = 1.15 X 100x = Rs. '115x'  Savings of the person remains the same.  So, 55x + 3300 = 115x - 45x  Or, 70x - 55x = 3300  Or, 15x = 3300  So, x = 220  So, the initial salary of the person = 100x = 100 × 220 = Rs.22,000
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