Percentages Quiz Set 011

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Question 1

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 2

If 4% of A + B = 9% of A - B, then what percent of B is A?

 A

$2{3/5}$ %.

 B

$4{1/2}$ %.

 C

$1{1/7}$ %.

 D

4 %.

Soln.
Ans: a

We have been given 4% of A + B = 9% of A - B, so ${A + B}/{A - B}$ = $9/4$. By componendo and dividendo, ${(A + B) + (A - B)}/{(A + B) - (A - B)}$ = ${9 + 4}/{9 - 4}$, which gives $A/B$ = $13/5$ = ${13/5}$, which is same as: $2{3/5}$%


Question 3

The service tax is 5%. A person receives a telephone bill amounting to Rs. 630. How much was the bill excluding tax?

 A

Rs. 600.

 B

Rs. 610.

 C

Rs. 590.

 D

Rs. 620.

Soln.
Ans: a

Let the calls be for Rs. x. The total bill is x + 5% of x = ${21x}/20 = 630$, which gives x = Rs. 600.


Question 4

A shopkeeper sells 56% items of his stock and still has 748 items left with him. How many items did he have at the beginning?

 A

1700 items.

 B

1800 items.

 C

1600 items.

 D

1900 items.

Soln.
Ans: a

Let the items be x. His % stock left is 100 - 56 = 44, so 44% of x = 748, which gives x = $748/44$ × 100 = 1700 items.


Question 5

A clerk multiplied a number by 2/1 instead of 1/2. What is the percentage of error?

 A

75 %.

 B

77 %.

 C

73 %.

 D

79 %.

Soln.
Ans: a

If the actual figure is x, the error is ${2x}/1$ - ${1x}/2$ = ${2^2x - 1^2x}/{2 × 1}$ = ${3x}/2$, so %-error = ${(3x)/2}/{(2x)/1}$ × 100 = ${3 × 1}/{2 × 2}$ × 100 = 75%.


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Creative Commons License
This Blog Post/Article "Percentages Quiz Set 011" by Parveen (Hoven) is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Updated on 2019-08-18.

Posted by Parveen(Hoven),
Aptitude Trainer


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