Weight reduced from 90 kg to 81 kg. Percentage decrease: MCQ with Answer and Explanation

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Weight reduced from 90 kg to 81 kg. Percentage decrease:

A. 8%

B. 10%

C. 9%

D. 11%

Answer: Option B

Solution (By JKSSB Mock Tests)

Decrease = 9 kg, (9/90)×100 = 10%.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

15% of 40 greater than 25% of a number by 2. The number:

A. 14

B. 16

C. 12

D. 18

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Correct Answer: Option B

Explanation:
6 = 0.25x + 2 → 0.25x = 4 → x = 16.

This question belongs to: Maths Percentage

Question #2

Fresh fruit has 68% water, dry fruit 20% water. Dry fruit from 100 kg fresh fruit:

A. 60 kg

B. 40 kg

C. 32 kg

D. 50 kg

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Correct Answer: Option B

Explanation:
Dry matter in fresh = 32 kg, in dry fruit 80% is dry matter, weight = 32/0.8 = 40 kg.

This question belongs to: Maths Percentage

Question #3

If the radius of a circle is increased by 100%, the area increases by:

A. 400%

B. 300%

C. 500%

D. 200%

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Correct Answer: Option B

Explanation:
Area proportional to radius². New radius 2r, area 4 times, increase = 300% (i.e., 4-1 = 3 times = 300%).

This question belongs to: Maths Percentage

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