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

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

A. 23.08%

B. 25%

C. 27.27%

D. 20%

Answer: Option A

Solution (By JKSSB Mock Tests)

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

This question belongs to: Maths Percentage

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Question #1

If a number is decreased by 10%, it becomes 90. What is the number?

A. 110

B. 90

C. 100

D. 80

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Correct Answer: Option C

Explanation:
Let the number be x. x * 0.90 = 90. x = 90 / 0.90 = 100.

This question belongs to: Maths Percentage

Question #2

Two numbers are 20% and 50% more than a third number. Their ratio is:

A. 4:5

B. 6:7

C. 5:4

D. 5:6

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Correct Answer: Option A

Explanation:
Third = 100, first = 120, second = 150, ratio = 120:150 = 4:5.

This question belongs to: Maths Percentage

Question #3

Increase 600 by 15%. Result is:

A. 680

B. 670

C. 690

D. 660

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Correct Answer: Option C

Explanation:
600 × 1.15 = 690.

This question belongs to: Maths Percentage

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