This set of Aptitude Questions and Answers (MCQs) focuses on “Percentage – Set 3”.

1. Find 11% of 13% of 17% of 1 million.

a) 2134

b) 2413

c) 3124

d) 2431

View Answer

Explanation: 17% of 1,000,000:

17 % of 1,000,000 = 17 * 1,000,000 / 100

170,000

13% of 170,000:

13 * 170,000 / 100 = 22,100

11% of 22,100:

11 * 22,100 / 100 = 2,431

2. A number if doubled, then tripled and this process is repeated twice. What is the percentage change?

a) 3500%

b) 3000%

c) 2500%

d) 1750%

View Answer

Explanation: Let the number be x.

The number is first doubled:

X * 2 = 2x

The number is then tripled:

2x * 3 = 6x

This process is repeated twice:

6x * 2 = 12x

12x * 3 = 36x

The change in value = 36x – x = 35x

The percentage change = 35x / x * 100 = 3500%

3. What percent of 50 is 0.005% of 10000?

a) 1%

b) 10%

c) 0.1%

d) 100%

View Answer

Explanation: 0.005% of 10,000 = 0.005 * 10,000 / 100 = 0.5

Percentage of 50 equivalent to 0.5 = 0.5 / 50 * 100 = 1%

4. By how much should 234 be reduced to make it 65% of itself?

a) 80.9

b) 81.9

c) 82.9

d) 83.9

View Answer

Explanation: To be equivalent to 65% of itself, the number 234 must be reduced by (100 – 35) % of itself.

234 must b reduced by 35 % of 234.

35% of 234 = 234 * 35 / 100 = 81.9

5. A number when increased by 120 it becomes 300% of itself, find 200% of the number.

a) 100

b) 180

c) 120

d) 150

View Answer

Explanation: Let the number be x.

X + 120 = 300% of x

X + 120 = 300x / 100

100x + 12,000 = 300x

12,000 = 300x – 100x

12,000 = 200x

X = 60

To find 200% of x:

200% of x

200 * x / 100 = 200 * 60 / 100 = 120

6. What is 90% of 900% of 9000% of 9?

a) 7290

b) 729

c) 6156

d) 6561

View Answer

Explanation: 9000% of 9:

900% of 9 = 9000 * 9 / 100 = 810

900% of 810:

900% of 810 = 900 * 810 / 100 = 7290

90% of 7290:

90% of 7290 = 90 * 7290 / 100 = 6561

7. 25% of x is 70% of y. Find the value of x : y.

a) 5 : 49

b) 6 : 23

c) 8 : 41

d) 7 : 40

View Answer

Explanation: 25% of x = 25x / 100 = x / 4

70% of y = 7y / 10

x / 4 = 7y / 10

x / y = 7 / (4 * 10) = 7 / 40

x : y = 7 : 40

8. A number is multiplied by 20% of itself, the sum is then doubled. If the final value is 490, find the number.

a) 35

b) 40

c) 45

d) 50

View Answer

Explanation: Let the number be x.

X is multiplied by 20% of itself and then doubled,

20% of x = x * 20 / 100 = x / 5

X * x / 5 = x

^{2}/ 5

The sum now is doubled: x

^{2}* 2 / 5 = 490

2x

^{2}= 490 * 5 = 2450

X

^{2}= 2450 / 2 = 1225

X

^{2}= 1225

X = 35

9. What is the result when 40% of 30% of 120 is multiplied by 20% of 80% of 220?

a) 588.06

b) 508.66

c) 506.88

d) 505.86

View Answer

Explanation: 30% of 120 = 30 * 120 / 100 = 36

40% of 36 = 40 * 36 / 100 = 14.4

80% of 220 = 80 * 220 / 100 = 176

20% of 176 = 20 * 176 / 100 = 35.2

14.4 * 35.2 = 506.88

10. Out of 25 employees of a company, 13 are set of and the salaries of rest of the employees is increased by 24%. Find the total increase of decrease in company’s expenditure.

a) 40.48% decreased

b) 40.44% increased

c) 44.48% decreased

d) 44.84% increased

View Answer

Explanation: Let the initial salary of each employee be 100.

The initial expenditure of the company = 25 * 100 = 2,500

Salary of the remaining employees:

100 + 24% of 100 = 100 + 24 = 124

The number of employees who are still in the job = 25 – 13 = 12

The final expenditure of the company = 12 * 124 = 1488

The difference in company’s expenditure = 2500 – 1488 = 1012

Percentage change in company’s expenditure = 1012 / 2500 * 100 = 40.48% decreased

To practice all aptitude questions, please visit “1000+ Quantitative Aptitude Questions”, “1000+ Logical Reasoning Questions”, and “Data Interpretation Questions”.