Percentages aptitude questions
Percentages questions are part of the Quant section of placement aptitude tests. Convert every percentage change to a multiplier before combining changes. Below are 5 worked examples with the answer and the working; practise ten fresh ones or take a timed mock when you are ready.
Example 1. After a 40% increase a salary becomes Rs 2100. What was the salary before the increase?
- A. Rs 3500
- B. Rs 600
- C. Rs 1500 (answer)
- D. Rs 840
The new value is (100 + 40)% of the old one, so old = Rs 2100 * 100/(100 + 40) = Rs 1500. Dividing by 40% instead of 140% is the common error.
Example 2. What is 15% of 400?
- A. 60 (answer)
- B. 340
- C. 15
- D. 600
Write the percentage as a fraction: 15% of 400 is (15/100) * 400 = 60.
Example 3. 315 is what percent of 900?
- A. 35% (answer)
- B. 350%
- C. 3.5%
- D. 65%
Percentage = (part / whole) * 100 = (315/900) * 100 = 35%.
Example 4. 285 is what percent of 1900?
- A. 15% (answer)
- B. 150%
- C. 85%
- D. 1.5%
Percentage = (part / whole) * 100 = (285/1900) * 100 = 15%.
Example 5. What is 15% of 1200?
- A. 15
- B. 180 (answer)
- C. 1800
- D. 1020
Write the percentage as a fraction: 15% of 1200 is (15/100) * 1200 = 180.
More Quant practice elsewhere: IndiaBIX, GeeksforGeeks. See the 60-day aptitude plan.