Percentages Quiz Set 003

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Question 1

A bag contains 280 red, 380 green and 1340 blue marbles. What percentage of the total is the most visible color in the bag?

 A

67 %.

 B

77 %.

 C

57 %.

 D

87 %.

Soln.
Ans: a

By inspection, blue is the most visible color. The percentage of blue is $1340/{280 + 380 + 1340}$ × 100 = 67%.


Question 2

Price of sugar is increased by 80%. By what percentage should consumption be reduced so that the expenditure remains same?

 A

$44{4/9}$ %.

 B

$51{1/8}$ %.

 C

$35{6/11}$ %.

 D

$38{9/11}$ %.

Soln.
Ans: a

Let price be Rs. 100/kg and the consumption be 1 kg. The current expenditure is 100 × 1 = Rs. 100. The new price of sugar is 100 + 80 = Rs. 180/kg. Let the new consumption be c kg. Now, if expenditure is to be same we should have 100 = 180 × c, which gives c = 100/180, so the decrease is 1 - $100/180$ = ${180 - 100}/180$ × 100% = ${400/9}$, which is same as: $44{4/9}$%.


Question 3

The number of online customers increased from 1075 to 2575. What is the percentage increase?

 A

$139{23/43}$ %.

 B

$143{37/42}$ %.

 C

$132{17/45}$ %.

 D

$136{1/5}$ %.

Soln.
Ans: a

The increase is 2575 - 1075 = 1500. The percentage increase is $1500/1075$ × 100 = ${6000/43}$, which is same as: $139{23/43}$.


Question 4

The service tax is 5%. A person receives a telephone bill amounting to Rs. 525. How much was the bill excluding tax?

 A

Rs. 500.

 B

Rs. 510.

 C

Rs. 490.

 D

Rs. 520.

Soln.
Ans: a

Let the calls be for Rs. x. The total bill is x + 5% of x = ${21x}/20 = 525$, which gives x = Rs. 500.


Question 5

If 80% of X is Y, then Y% of 80 is?

 A

64 % of X.

 B

74 % of X.

 C

54 % of X.

 D

84 % of X.

Soln.
Ans: a

We have Y = $(80 × X)/100$, so Y% of 80 is same as $(80 × X)/100$% × 80, which can be rearranged to $(80 × 80)/100$% × X = 64% of X.


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Creative Commons License
This Blog Post/Article "Percentages Quiz Set 003" 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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