Selected MCQ

Current Question
The price of petrol has increased by 25%. By what percent should consumption be reduced to keep expenditure constant?
  • A. 25%
  • B. 30%
  • C. 50%
  • D. 20%
Correct Answer: D
Explanation:
Reduction = 25/125 ×100 = 20%.
Related Question 1
The price of an item is increased by 15%. By what percent must consumption be reduced to keep expenditure constant?
  • A. 10 20/23 %
  • B. 13 1/23 %
  • C. 16 2/3 %
  • D. 15 %
Correct Answer: B
Explanation:
Reduction = 15/115 ×100 = 13 1/23%.
Related Question 2
If petrol price increases by 20%, by what percent should consumption decrease to keep expenditure the same?
  • A. 16⅔%
  • B. 6⅔%
  • C. 8%
  • D. 15%
Correct Answer: A
Explanation:
Required decrease = 20 / 120 × 100 = 16⅔%.
Related Question 3
If the price of sugar increases by 25%, by what percent must consumption decrease to keep expenditure constant?
  • A. 20%
  • B. 25%
  • C. 30%
  • D. 15%
Correct Answer: A
Explanation:
Required decrease = 25 / 125 × 100 = 20%.
Related Question 4
The price of an article is reduced by 25%. By what percent should it be increased to restore the original price?
  • A. 33 1/3 %
  • B. 11 1/9 %
  • C. 9 1/11 %
  • D. 66 2/3 %
Correct Answer: A
Explanation:
Required increase = 25/75 ×100 = 33 1/3%.
Related Question 5
A shopkeeper marks goods 25% above the cost price and gives 10% discount. What is his profit percent ____.
  • A. 10%
  • B. 12.5%
  • C. 15%
  • D. 20%
Correct Answer: B
Explanation:
Net gain = (1.25 × 0.9 − 1) × 100.