The price of a product increases by 20%, and then again by 20%. What is the net percentage increase? MCQ with Answer and Explanation

The price of a product increases by 20%, and then again by 20%. What is the net percentage increase?

A. 48%

B. 40%

C. 44%

D. 42%

Answer: Option C

Successive percentage formula: 20 + 20 + (20 * 20 / 100) = 40 + 4 = 44%.

This question belongs to: Maths Percentage

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Question #1 Report Error

If the radius of a circle is decreased by 30%, the area decreases by:

A. 51%

B. 60%

C. 42%

D. 49%

Correct Answer: Option A

Explanation:
New area = 0.7² = 0.49, decrease 51%.

This question belongs to: Maths Percentage

Question #2 Report Error

45% of a number is 135. The number is:

A. 250

B. 300

C. 280

D. 320

Correct Answer: Option B

Explanation:
0.45x = 135 → x = 300.

This question belongs to: Maths Percentage

Question #3 Report Error

A man spends 50% of his income. His income rises by 50% and expenditure by 20%. Percentage increase in savings is:

A. 80%

B. 60%

C. 90%

D. 70%

Correct Answer: Option A

Explanation:
Let income = 100, exp = 50, sav = 50. New income = 150, exp = 60, sav = 90. Increase = 40 on 50 = 80%.

This question belongs to: Maths Percentage