model 1 simple percentage questions Section-Wise Topic Notes With Detailed Explanation And Example Questions

MOST IMPORTANT quantitative aptitude - 11 EXERCISES

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The following question based on percentage topic of quantitative aptitude

Questions : If 80% of A = 50% of B and B = x% of A, then the value of x is :

(a) 160

(b) 150

(c) 400

(d) 300

The correct answers to the above question in:

Answer: (a)

According to question,

A×$80/100 = B×50/100$

= B= ${A × 80}/50$ = 1.6A

B = 160% of A

x = 160

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Read more simple percentage Based Quantitative Aptitude Questions and Answers

Question : 1

What is to be added to 15% of 160 so that the sum may be equal to 25% of 240 ?

a) 60

b) 36

c) 24

d) 84

Answer: (b)

Required number = ${240 × 25}/100 - {160 × 15}/100$

= 60 – 24 = 36

Question : 2

2 is what percent of 50?

a) 4

b) 5

c) 2

d) 2.5

Answer: (a)

Let 2 be x% of 50

x% of 50 = 2

$x/100$× 50 = 2⇒ $x/2$ = 2

x = 4

Question : 3

A box has 100 blue balls, 50 red balls, 50 black balls. 25% of blue balls and 50% of red balls are taken away. Percentage of black balls at present is

a) 33$1/3$%

b) 40%

c) 50%

d) 25%

Answer: (a)

After taking away respective balls,

Number of balls in the box = 75 + 25 + 50 = 150

Percentage of black balls = $50/150 × 100$

=$100/3 = 33{1}/3$%

Question : 4

If 50% of (P – Q) = 30% of (P + Q) and Q = x% of P, then the value of x is :

a) 20

b) 50

c) 30

d) 25

Answer: (d)

${P – Q}/2 = (P + Q) × 30/100$

5(P - Q) = (P + Q) × 3

5P - 3P = 5Q + 3Q

2P = 8Q

P = 4Q = 4 × ${P × x}/100$

${4x}/100$= 1 ⇒ x = 25

Question : 5

If three-fifth of sixty per cent of a number is 36, the number is

a) 75

b) 90

c) 100

d) 80

Answer: (c)

Let the number be x.

$3/5 × 60/100 × x = 36$

$x = {36 × 5 × 5}/{3 × 3}$ = 100

Question : 6

If 90% of A = 30% of B and B = x% of A, then the value of x is

a) 700

b) 400

c) 800

d) 300

Answer: (d)

A × $90/100 = {B × 30}/100$

A × 3 = B

A × x% = A × 3

$x/100$ = 3 ⇒ x = 300

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GET percentage PRACTICE TEST EXERCISES

model 1 simple percentage questions

model 2 net increase or decrease in %

model 3 reducing & exceeding prices

model 4 x & y comparison

model 5 income & expenditure

model 6 consumption & remaining

model 7 marks scored in examinations

Model 8 population based

model 9 voters & election

model 10 percentage with allegations & mixture

model 11 percentage with ratios
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