Question
Raman's earnings have gone up by 12.5%. While
maintaining the same level of expenditure, his savings have increased by 50%. Determine the percentage of his initial income that he spends.Solution
ATQ, Let, the initial income of the Raman be Rs. '8x'. So, the new income of the Raman = 1.125 × 8x = Rs. '9x' Let, his initial expenditure = New expenditure be Rs.'y' ATQ, 9x - y = 1.5 × (8x - y) Or, 9x - y = 12x - 1.5y Or, 12x - 9x = 1.5y - y Or, 3x = 0.5y Or, (y/x) = (3/0.5) Or, (y/x) = 6 Or, y = 6x So, the required % = (y/8x) × 100 = (6x/8x) × 100 = 75%
(750 / 15 × 15 + 152 + 20% of 125) = ?3
26 2 – 13% of 400 + (529 ÷ 23 2 ) = ? 2
104 × 21 ÷ 13 + ? % of 300 = 320 + 22
84% of 800 + 70% of 640 = 14 × ?
26% of 650 + 15% of 660 – 26% of 450 = ?
9/5 × 18/25 ÷ 42/21 = ? - 82/75
What will come in the place of question mark (?) in the given expression?
48 X 2.5 + 20% of 150 = ? + 166
18 × √225 + 378 ÷ √441 = ? × 9
3.2% of 500 × 2.4% of ? = 288
What will come in place of the question mark (?) in the following expression?
18 × 16 – 11 × 4 = 15² + ?
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