Number increased by 30%. By what % should new number be decreased to get original? MCQ with Answer and Explanation

Number increased by 30%. By what % should new number be decreased to get original?

A. 27.27%

B. 23.08%

C. 25%

D. 20%

Answer: Option B

Original 100, new 130. Decrease % = (30/130)×100 ≈ 23.08%.

This question belongs to: Maths Percentage

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Question #1 Report Error

A population increases by 5% yearly. Its present population is 88,200. What was it 2 years ago?

A. 82000

B. 78000

C. 80000

D. 84000

Correct Answer: Option C

Explanation:
P_past = 88200 / (1.05)^2 = 88200 / 1.1025 = 80000.

This question belongs to: Maths Percentage

Question #2 Report Error

50% of 500 minus a number gives 200. The number:

A. 50

B. 45

C. 55

D. 40

Correct Answer: Option A

Explanation:
250 - x = 200 → x = 50.

This question belongs to: Maths Percentage

Question #3 Report Error

The population of a town increases by 8% annually. If its present population is 2,33,280, what was it 2 years ago?

A. 1,80,000

B. 1,90,000

C. 2,00,000

D. 2,10,000

Correct Answer: Option C

Explanation:
Pop 2 yrs ago = 233280 / (1.08)² = 233280 / 1.1664 = 200000.

This question belongs to: Maths Percentage