What is 30% of 400 minus 15% of 200? MCQ with Answer and Explanation

What is 30% of 400 minus 15% of 200?

A. 80

B. 100

C. 90

D. 70

Answer: Option C

30% of 400 = 120, 15% of 200 = 30, difference = 90.

This question belongs to: Maths Percentage

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Question #1 Report Error

Numerator of a fraction increased by 20%, denominator decreased by 10%, fraction becomes 2/3. Original fraction:

A. 2/5

B. 1/3

C. 3/5

D. 1/2

Correct Answer: Option D

Explanation:
(1.2a)/(0.9b) = 2/3 → (4/3)(a/b)=2/3 → a/b = 1/2.

This question belongs to: Maths Percentage

Question #2 Report Error

Two numbers 25% and 40% less than a third. Second is what % of first?

A. 90%

B. 80%

C. 85%

D. 75%

Correct Answer: Option B

Explanation:
Third=100, first=75, second=60; (60/75)×100=80%.

This question belongs to: Maths Percentage

Question #3 Report Error

Price decreased by 15% then increased by 15%. Net change is:

A. 2.25% decrease

B. No change

C. 1.5% decrease

D. 2.25% increase

Correct Answer: Option A

Explanation:
0.85 × 1.15 = 0.9775, 2.25% decrease.

This question belongs to: Maths Percentage