Percentage practice questions for competitive exams

If 30% of x is 72. Then the value of x is?
a. 220
b. 480
c. 840
d. 240

Answer: d. 240
Solution: $\frac{30}{100} \times x = 72$

$x = \frac{72 \times 100}{30} = 240$

What is 20% of 25% of 900?
a. 150
b. 30
c. 45
d. 15

Answer: c. 45
Solution : $\frac{20}{100} \times \frac{25}{100} \times 100 = 45$

If A’s Income is 20 percent more then the B’s Income Then what percent of B’s Income is A’s income?
a. 25
b. 20
c. 80
d. 75

Answer: c. 80
Solution: Let B’s income be 100rs
If B’s Income is 100rs then the A’s income will be 125rs
$125 \times \frac{x}{100} = 100$
$x = 100 \times \frac{100}{125} = 80$

If A’s income is 50% less than the B’s income, then B’s income is what percent more than the A’s income
a. 75%
b. 125%
c. 100%
d. 50%

Answer: c. 100%
Solution: Let B’s income 100
If B’s income is 100 then the A’s income will be 50
B’s income is 100% more than the A’s income

Aman’s salary was reduced by 10% and then the reduced salary was increased by 10%. His new salary in comparison with his old salary is?
a. 1% more
b. 1% less
c. 2% more
d. 2% less

Answer: b. 1% less
Solution: Let Aman salary be 100
According to the question
$100 \times \frac{90}{100} \times \frac{110}{100} = 99$
Aman salary after change is 99 which is 1% less than the 100.

The monthly salary of Aman and Suresh together amount to Rs. 40,000. Aman spends 85% of his salary and Suresh spends 95% of his salary. If their savings are the same then the salary of Aman is?
a. Rs. 10,000
b. Rs. 12,000
c. Rs. 15,000
d. Rs. 5,000

Answer: a. Rs. 10,000
Solution: Let the monthly salary of Aman be x
Monthly salary of Suresh = (40,000-x)
Aman savings= $\frac{15 x}{100} = \frac{3 x}{20}$
Suresh Savings = $(40,000 - x) \times \frac{5}{100}$ = $\frac{40,000 - x}{20}$
$\frac{3 x}{20} = \frac{40,000 - x}{20}$
$3 x = 40,000 - x$
$4 x = 40,000$
$x = 10,000$

In an examination, there were 100 boys and 80 girls. 60% percent of the boys and 50% of the girl were passed. Find the percentage of candidate that were failed?
a. 46.4%
b. 48.4%
c. 44.4%
d. 49.6%

Answer: c. 44.4%
Solution: Total number of students = 100+80 = 180
No. of boys passed = 60% of 100 = 60
No. of girls passed = 50% of 80 = 40
Total number of student passed = 60+40 = 100
Total number of students that not passed = 180-100= 80
Percentage of candidate that were failed :
$180 \times \frac{x}{100} = 80$
$x = 80 \times \frac{100}{180} = 44.4$

The price of petrol is increased by 25%. By how much percent a bike owner should reduce the consumption of the petrol so that the expenditure of the petrol should not be increased?
a. 25%
b. 50%
c. 30%
d. 20%

Answer: d. 20%
Solution: The percentage by which the petrol consumption should be reduced by
$\frac{25 \times 100}{125} = 20$

Sachin has to got 40% marks to pass in an examination. He gets 80 marks and fails by 20 marks. Maximum marks are?
a. 200
b. 220
c. 250
d. 300

Answer: c. 250
Solution: Let the maximum marks be x
Total marks needed to be passed in the examination = 80+20= 100 $x \times \frac{40}{100} = 100$
$x = 100 \times \frac{100}{40} = 250$

A student got 40% marks in maths subject out of 300. How much should he score in the English subject out of 200 if he is to get overall 50% marks?
a. 60%
b. 65%
c. 70%
d. 75%

Answer: b. 65%
Let the percentage in english be x Total marks of both subjects = 300+200 = 500
Marks he needs to pass in examination is 50% of 500 which is 250
Marks he gets in Maths is $300 \times \frac{40}{100}$
Marks he needs to get in science is = 250-120 = 130
lets see how much percent of 200 is 130
$200 \times \frac{x}{100} = 130$
$x = 67.5$

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Pariksha buddy

Percentage practice questions for competitive exams

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