model 1 simple percentage questions Practice Questions Answers Test with Solutions & More Shortcuts

percentage PRACTICE TEST [11 - 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

percentage Important Formulas, Rules, Concepts & Shortcuts

Question : 41

A student multiplied a number by $3/5$ instead of $5/3$ . What is the percentage error in the calculation ?

a) 54%

b) 64%

c) 44%

d) 34%

Shortcut »

Answer: (b)

Let x be the multiplicand.

Error = $5/3x - 3/5x$

= $\text"25x – 9x"/15 =\text"16x"/15$

Percentage error = ${\text"16x"/15}/{5/3x}$ × 100

=$\text"16x"/15×3/\text"5x"$ ×100=64%

Question : 42 [SSC CHSL 2012]

A team played 40 games in a season and won in 24 of them. What percent of games played did the team win?

a) 60%

b) 35%

c) 70%

d) 40%

Shortcut »

Answer: (a)

Required percentage = $24/40 × 100$ = 60%

Question : 43

If x is 80% of y, what percent of y is x ?

a) 100%

b) 125%

c) 75%

d) 80%

Shortcut »

Answer: (b)

According to question,

y = ${100 × 100}/80$ of x

y = 125% of x

Question : 44

In a college, 40% of the students were allotted group A, 75% of the remaining were given group B and the remaining 12 students were given group C. Then the number of students who applied for the group is

a) 80

b) 92

c) 100

d) 60

Shortcut »

Answer: (a)

Group A = 40%

Group B = ${60 × 75}/100$ = 45%

Group C = 15%

If the total number of students be x,

then ${x × 15}/100$ = 12

x = ${12 × 100}/15$= 80

Question : 45 [SSC CGL Prelim 2008]

65g is what per cent of 2 kg ?

a) $15/8$

b) $13/8$

c) $13/4$

d) $65/2$

Shortcut »

Answer: (c)

Required percentage = $65/2000 × 100 = 13/4$

[Since 2kg = 2000g]

IMPORTANT quantitative aptitude EXERCISES

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