QA – Placement Quizzes | Percentages | Question 4

Jack consumes 75% of his salary. Later his salary is increased by 20% and he increases his expenditures by 10%. Find the percentage increase in his savings.
(A) 51%
(B) 60%
(C) 50%
(D) 55%


Answer: (C)

Explanation: Let Jack’s original salary be Rs 100. Then,
his expenditure = Rs 75,
his savings = Rs 25.
Now, his new salary = Rs 120. So,
new expenditure = (110/100) × 75 = Rs 165/2,
new savings = 120 – 165/2 = Rs 75/2.
Increase in savings = 75/2 – 25 = Rs 25/2.
Therefore, percentage increase in savings = (25/2)/25 × 100% = 50%.

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