A number is increased by 10%, then increased by 20%, then decreased by 10%. Net percentage change: MCQ with Answer and Explanation

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A number is increased by 10%, then increased by 20%, then decreased by 10%. Net percentage change:

A. 16% increase

B. 18.8% increase

C. 20% increase

D. 12.8% increase

Answer: Option B

Solution (By JKSSB Mock Tests)

1.1 × 1.2 × 0.9 = 1.188, increase 18.8%.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

20% of A = 30% of B = 1/6 of C. Ratio A:B:C:

A. 15:10:12

B. 18:10:15

C. 15:10:18

D. 10:15:18

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Correct Answer: Option C

Explanation:
Let 20%A=30%B=C/6 = k. A=5k, B=10k/3, C=6k → multiply by 3: 15:10:18.

This question belongs to: Maths Percentage

Question #2

Car value depreciates 20% first year, 15% second. Bought for 4,00,000, value after 2 years:

A. 2,72,000

B. 2,88,000

C. 2,80,000

D. 2,56,000

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Correct Answer: Option A

Explanation:
4,00,000×0.8×0.85 = 2,72,000.

This question belongs to: Maths Percentage

Question #3

Ratio of two numbers 3:4. First increased 10%, second 20%. New ratio:

A. 11:15

B. 11:16

C. 12:17

D. 33:44

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Correct Answer: Option B

Explanation:
First = 3.3, second = 4.8, ratio = 33:48 = 11:16.

This question belongs to: Maths Percentage

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