What percent of 80 is 20? MCQ with Answer and Explanation

What percent of 80 is 20?

A. 20%

B. 15%

C. 30%

D. 25%

Answer: Option D

(20/80) × 100 = 25%.

This question belongs to: Maths Percentage

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Question #1 Report Error

A can do a piece of work in 20 days. B is 25% more efficient than A. How many days will B alone take to do the work?

A. 15 days

B. 16 days

C. 18 days

D. 14 days

Correct Answer: Option B

Explanation:
Efficiency ratio A:B = 100:125 = 4:5. Time ratio = 5:4. B's time = (4/5)×20 = 16 days.

This question belongs to: Maths Percentage

Question #2 Report Error

The cost of an article is Rs. 500. It is marked up by 40% and then a discount of 30% is given. What is the selling price?

A. Rs. 480

B. Rs. 490

C. Rs. 470

D. Rs. 460

Correct Answer: Option B

Explanation:
MP = 500×1.4=700, SP=700×0.7=490.

This question belongs to: Maths Percentage

Question #3 Report Error

A number increased by 10% then decreased by 10% gives net:

A. 0%

B. 1% decrease

C. 2% decrease

D. 1% increase

Correct Answer: Option B

Explanation:
1.1 × 0.9 = 0.99, 1% decrease.

This question belongs to: Maths Percentage