By what percent is 80 less than 100? MCQ with Answer and Explanation

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By what percent is 80 less than 100?

A. 15%

B. 20%

C. 25%

D. 10%

Answer: Option B

Solution (By JKSSB Mock Tests)

Difference = 20, % = (20/100)×100 = 20%.

This question belongs to: Maths Percentage

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Question #1

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A man's income is Rs. 25000. He spends 40% on food, 30% on rent, 20% on other items and saves the rest. By what percent should he reduce his food expenditure to increase his savings by 20%?

A. 4%

B. 7%

C. 5%

D. 6%

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Correct Answer: Option C

Explanation:
Present savings = 10% of 25000 = 2500. New savings = 3000. Reduction in food = 500. Food = 10000, % reduction = (500/10000)×100 = 5%.

This question belongs to: Maths Percentage