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

Question

Share Report Error

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

A. 10% decrease

B. 4% increase

C. No change

D. 4% decrease

Answer: Option D

Solution (By JKSSB Mock Tests)

Let the number be 100. After 20% increase, it becomes 120. After 20% decrease, it becomes 120 * 0.8 = 96. Net change = 100 - 96 = 4% decrease.

This question belongs to: Maths Percentage

Request complete Subject PDF

Discuss this Question (0)

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

Practice More Percentage Questions

Question #1

Share Report

In an election, 20% of the votes were invalid. A got 55% of valid votes and won by 2000 votes. Total votes polled:

A. 28000

B. 24000

C. 25000

D. 22000

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Valid votes V, margin 0.1V=2000 → V=20000. Total T, 0.8T=20000 → T=25000.

This question belongs to: Maths Percentage

Question #2

Share Report

40% of 250 + 15% of 200 = ?

A. 125

B. 130

C. 135

D. 120

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
100 + 30 = 130.

This question belongs to: Maths Percentage

Question #3

Share Report

A man spends 70% of his income. If he saves Rs. 3000, what is his total income?

A. 12000

B. 9000

C. 8000

D. 10000

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Savings = 100% - 70% = 30%. 30% of Income = 3000. Income = 3000 * (100 / 30) = 10000.

This question belongs to: Maths Percentage

Explore All Percentage MCQs