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Percentage - Aptitude MCQ Questions and Solutions with Explanations

Percentage MCQ Questions and answers with easy and logical explanations.Arithmetic Ability provides you all type of quantitative and competitive aptitude mcq questions on Percentage with easy and logical explanations. Percentage MCQ is important for exams like Banking exams,IBPS,SCC,CAT,XAT,MAT etc. Page-8 section-2

Each section contains 100 MCQs on Percentage .
71
The number that is to be added to 10% of 320 to have the sum as 30% of 230 is :
Discuss
Answer & Solution
Answer: Option A
Solution:
Let the number be x
According to the question,
x + 320 × $$\frac{10}{100}$$ = 230 × $$\frac{30}{100}$$
x + 32 = 69
x = 37
Hence, required number = 37
72
25% of 120 + 40% of 380 = ? of 637
Discuss
Answer & Solution
Answer: Option A
Solution:
120 × $$\frac{25}{100}$$ + 380 × $$\frac{40}{100}$$ = x × 637
⇒ 30 + 152 = x × 637
⇒ $$\frac{182}{637}$$ = x
⇒ x = $$\frac{2}{7}$$
⇒ Required answer = $$\frac{2}{7}$$
73
A number, on subtracting 15 from it reduces to its 80%. What is 40% of the number ?
Discuss
Answer & Solution
Answer: Option C
Solution:
Let the number = x
According to the question,
x - 15 = $$\frac{80x}{100}$$
x - 15 = $$\frac{4x}{5}$$
5x - 75 = 4x
x = 75
Required answer
= 75 × $$\frac{40}{100}$$
= 30
74
If 35% of A's income is equal to 25% of B's income, then the ratio of A's income to B's income is :
Discuss
Answer & Solution
Answer: Option B
Solution:
A 35% = B 25%
$$\frac{A}{B}$$ = $$\frac{5}{7}$$
A : B = 5 : 7
75
If y% of one hour is, 1 minute 12 seconds, then y is equal to :
Discuss
Answer & Solution
Answer: Option A
Solution:
1 hour = 60 minutes
1 min + 12 sec
= 1 + $$\frac{12}{60}$$ = $$\frac{6}{5}$$ min
According to the question,
60 × $$\frac{y}{100}$$ = $$\frac{6}{5}$$
y = 2
76
When the price of an article was reduce by 20%, its sale increased by 80%. What was the net effect on the sale ?
Discuss
Answer & Solution
Answer: Option A
Solution:
Let conside 100 item sold on Rs.100
∴ Total Amount = 100 × 100 = Rs. 10000
Now After 20% discount price become Rs.80
Total Number of Sale increased after discount is 80%.
i.e.
100 + 80% of 100 = 180(Item sold)
∴ Total Amount = 180 × 80 = Rs. 14400

Increased in amount = 14400 - 10000 = 4400
% Increase in amount
= $$\frac{{4400 \times 100}}{{10000}} $$
= 44% (increase)
77
In an examination, 34% failed in Mathematics and 42% failed in English. If 20% failed in both the subjects, the percentage of students who passed in both subjects was :
Discuss
Answer & Solution
Answer: Option C
Solution:
Failed students in Mathematics = 34%
Failed students in English = 42%
Student failed in both subject math and english = 20%
Student only fail in Math = 34 - 20 = 14%
Student only fail in English = 42 - 20 = 22%
Percentage of passed students in both subjects :
= 100 - [ student fail in maths + student fail in english + student fail in both subject]
= [100 - (14 + 20 + 22)]
= 44%
78
In an election there were only two candidates. One of the candidate secured 40% of votes and is defeated by the other candidate by 298 votes. The total number of votes polled is :
Discuss
Answer & Solution
Answer: Option C
Solution:
Let the total number of the voter is 100x and the winner get 60x votes and loser get 40x votes.
∴ According to question
60x - 40x = 298
⇒ x = $$\frac{298}{20}$$
∴ Total Number of voter = 100 × $$\frac{298}{20}$$   = 1490
79
In what ratio must a mixture of 30% alcohol strength be mixed with that of 50% alcohol strength so as get a mixture of 45% alcohol strength ?
Discuss
Answer & Solution
Answer: Option B
Solution:
By using Alligation rule,
Percentage mcq solution image
Hence, required ratio = 1 : 3
80
When 60% of a number is subtracted from another number, the second number reduces to its 52%, the ratio of the first number to the second number is :
Discuss
Answer & Solution
Answer: Option D
Solution:
Let the first and second number is a and b respectively,
b - $$\frac{60a}{100}$$ = $$\frac{52b}{100}$$
b - $$\frac{52b}{100}$$ = $$\frac{60a}{100}$$
$$\frac{48b}{100}$$ = $$\frac{60a}{100}$$
4b = 5a
$$\frac{a}{b}$$ = $$\frac{4}{5}$$
⇒ a : b = 4 : 5