A number is increased by 20% and then decreased by 20%. What is the net change? MCQ with Answer and Explanation

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A number is increased by 20% and then decreased by 20%. What is the net change?

A. 2% decrease

B. No change

C. 4% decrease

D. 4% increase

Answer: Option C

Solution (By JKSSB Mock Tests)

Net change = x^2 / 100 % decrease. 20^2 / 100 = 400 / 100 = 4% decrease.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

If A is twice of B, then B is what percentage less than A?

A. 50%

B. 75%

C. 25%

D. 100%

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Correct Answer: Option A

Explanation:
A = 2B. Difference is B. Percentage less = (B / A) * 100 = (B / 2B) * 100 = 50%.

This question belongs to: Maths Percentage

Question #2

A number is increased by 50% and then decreased by 50%. The net change is:

A. 50% decrease

B. 25% increase

C. No change

D. 25% decrease

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Correct Answer: Option D

Explanation:
1.5 × 0.5 = 0.75, 25% decrease.

This question belongs to: Maths Percentage

Question #3

What is 12.5% of 800?

A. 150

B. 100

C. 120

D. 80

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Correct Answer: Option B

Explanation:
12.5% is equivalent to the fraction 1/8. (1/8) * 800 = 100.

This question belongs to: Maths Percentage

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