A salary is increased by 30% and then decreased by 30%. What is the net change? MCQ with Answer and Explanation

A salary is increased by 30% and then decreased by 30%. What is the net change?

A. 9% decrease

B. 9% increase

C. 0%

D. 6% decrease

Answer: Option A

Net change = x^2 / 100 % decrease. 30^2 / 100 = 900 / 100 = 9% decrease.

This question belongs to: Maths Percentage

No comments yet. Be the first to start the discussion!

Question #1 Report Error

If the length of a rectangle is increased by 25% and the breadth is decreased by 20%, what is the percentage change in its perimeter?

A. Cannot be determined

B. 2.5% increase

C. 5% increase

D. No change

Correct Answer: Option A

Explanation:
Perimeter change depends on the original values of length and breadth, so cannot be determined without them.

This question belongs to: Maths Percentage

Question #2 Report Error

What percentage of 80 is 16?

A. 25%

B. 15%

C. 20%

D. 10%

Correct Answer: Option C

Explanation:
(16 / 80) * 100 = 20%.

This question belongs to: Maths Percentage

Question #3 Report Error

40% of a number exceeds 25% of the same number by 30. What is 75% of the number?

A. 170

B. 150

C. 160

D. 180

Correct Answer: Option B

Explanation:
0.4x - 0.25x = 0.15x = 30 → x = 200. 75% of 200 = 150.

This question belongs to: Maths Percentage