All Exams: Quantitative Aptitude — Percentage (20 Practice MCQs)
Practice 20 carefully selected MCQs on Percentage for the All Exams exam. Each question includes a detailed explanation to help you understand the concept, not just memorise the answer.
Difficulty: Medium | Exam Year: 2026 | Time suggested: 20 minutes
Q1. What is 15% of 240?
Explanation: 15% of 240 = (15/100) × 240 = 36.
Q2. If a number is increased by 20% and then decreased by 20%, the net change is:
- A. No change
- B. 4% decrease
- C. 2% decrease
- D. 4% increase
Explanation: Let number = 100. After 20% increase: 120. After 20% decrease: 120 × 0.8 = 96. Net change = 4% decrease.
Q3. A shopkeeper marks his goods 40% above cost price and gives 10% discount. Find his profit %:
Explanation: CP = 100, MP = 140. SP = 140 × 0.9 = 126. Profit% = 26%.
Q4. In an election, candidate A got 55% votes and won by 6600 votes. Total votes cast:
- A. 66000
- B. 60000
- C. 72000
- D. 55000
Explanation: A got 55%, B got 45%. Margin = 10%. 10% of total = 6600. Total = 66000.
Q5. A's salary is 20% more than B's. By what percent is B's salary less than A's?
- A. 16.67%
- B. 20%
- C. 25%
- D. 18%
Explanation: If B = 100, A = 120. B is less than A by 20/120 × 100 = 16.67%.
Q6. What is 15% of 240?
Explanation: 15% of 240 = (15/100) × 240 = 36.
Q7. If a number is increased by 20% and then decreased by 20%, the net change is:
- A. No change
- B. 4% decrease
- C. 2% decrease
- D. 4% increase
Explanation: Let number = 100. After 20% increase: 120. After 20% decrease: 120 × 0.8 = 96. Net change = 4% decrease.
Q8. A shopkeeper marks his goods 40% above cost price and gives 10% discount. Find his profit %:
Explanation: CP = 100, MP = 140. SP = 140 × 0.9 = 126. Profit% = 26%.
Q9. In an election, candidate A got 55% votes and won by 6600 votes. Total votes cast:
- A. 66000
- B. 60000
- C. 72000
- D. 55000
Explanation: A got 55%, B got 45%. Margin = 10%. 10% of total = 6600. Total = 66000.
Q10. A's salary is 20% more than B's. By what percent is B's salary less than A's?
- A. 16.67%
- B. 20%
- C. 25%
- D. 18%
Explanation: If B = 100, A = 120. B is less than A by 20/120 × 100 = 16.67%.
Q11. What is 15% of 240?
Explanation: 15% of 240 = (15/100) × 240 = 36.
Q12. If a number is increased by 20% and then decreased by 20%, the net change is:
- A. No change
- B. 4% decrease
- C. 2% decrease
- D. 4% increase
Explanation: Let number = 100. After 20% increase: 120. After 20% decrease: 120 × 0.8 = 96. Net change = 4% decrease.
Q13. A shopkeeper marks his goods 40% above cost price and gives 10% discount. Find his profit %:
Explanation: CP = 100, MP = 140. SP = 140 × 0.9 = 126. Profit% = 26%.
Q14. In an election, candidate A got 55% votes and won by 6600 votes. Total votes cast:
- A. 66000
- B. 60000
- C. 72000
- D. 55000
Explanation: A got 55%, B got 45%. Margin = 10%. 10% of total = 6600. Total = 66000.
Q15. A's salary is 20% more than B's. By what percent is B's salary less than A's?
- A. 16.67%
- B. 20%
- C. 25%
- D. 18%
Explanation: If B = 100, A = 120. B is less than A by 20/120 × 100 = 16.67%.
Q16. What is 15% of 240?
Explanation: 15% of 240 = (15/100) × 240 = 36.
Q17. If a number is increased by 20% and then decreased by 20%, the net change is:
- A. No change
- B. 4% decrease
- C. 2% decrease
- D. 4% increase
Explanation: Let number = 100. After 20% increase: 120. After 20% decrease: 120 × 0.8 = 96. Net change = 4% decrease.
Q18. A shopkeeper marks his goods 40% above cost price and gives 10% discount. Find his profit %:
Explanation: CP = 100, MP = 140. SP = 140 × 0.9 = 126. Profit% = 26%.
Q19. In an election, candidate A got 55% votes and won by 6600 votes. Total votes cast:
- A. 66000
- B. 60000
- C. 72000
- D. 55000
Explanation: A got 55%, B got 45%. Margin = 10%. 10% of total = 6600. Total = 66000.
Q20. A's salary is 20% more than B's. By what percent is B's salary less than A's?
- A. 16.67%
- B. 20%
- C. 25%
- D. 18%
Explanation: If B = 100, A = 120. B is less than A by 20/120 × 100 = 16.67%.
Answer Summary
Review all explanations carefully. For wrong answers, go back to the concept guide for Percentage and revise the relevant shortcut or rule.
