Percentages Quiz Set 002

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Question 1

The age of Mr. X is 40% more than Mr. Y's age which is 20 years at present. By what percent is Y's age less than Mr. X's age?

 A

$28{4/7}$ %.

 B

$34{1/2}$ %.

 C

$21{4/9}$ %.

 D

$24{5/9}$ %.

Soln.
Ans: a

Age of Mr. X is 20 + ${40 × 20}/100$ = 28 years. Mr. Y's age is less than Mr. X's age by ${40 × 20}/100$ = 8 years. In terms of percentage, it is $8/28$ × 100 = ${200/7}$, which is same as: $28{4/7}$.


Question 2

A carton contains 3000 led bulbs, some of them are red, some green and others are blue. How many are green if 9% are red and 5% are blue?

 A

2580.

 B

2680.

 C

2480.

 D

2780.

Soln.
Ans: a

The percentage of green is 100 - (9 + 5) = 86. So number of green bulbs = $86/100$ × 3000 = 2580.


Question 3

The number of online customers increased from 1825 to 2875. What is the percentage increase?

 A

$57{39/73}$ %.

 B

$59{25/72}$ %.

 C

$55{2/75}$ %.

 D

$58{23/25}$ %.

Soln.
Ans: a

The increase is 2875 - 1825 = 1050. The percentage increase is $1050/1825$ × 100 = ${4200/73}$, which is same as: $57{39/73}$.


Question 4

The service tax is 5%. A person receives a telephone bill amounting to Rs. 840. How much was the bill excluding tax?

 A

Rs. 800.

 B

Rs. 810.

 C

Rs. 790.

 D

Rs. 820.

Soln.
Ans: a

Let the calls be for Rs. x. The total bill is x + 5% of x = ${21x}/20 = 840$, which gives x = Rs. 800.


Question 5

If 50% of X is Y, then Y% of 50 is?

 A

25 % of X.

 B

35 % of X.

 C

15 % of X.

 D

45 % of X.

Soln.
Ans: a

We have Y = $(50 × X)/100$, so Y% of 50 is same as $(50 × X)/100$% × 50, which can be rearranged to $(50 × 50)/100$% × X = 25% of X.


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Creative Commons License
This Blog Post/Article "Percentages Quiz Set 002" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2017-04-07.

Posted by Parveen(Hoven),
Aptitude Trainer


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