Practice MCQ Questions and Answer on Percentage

One-fifth of half of a number is 20. Then 20% of that number is :

(A) 80
(B) 60
(C) 20
(D) 40

Solution: Let the number is = x According to the question, $\frac{1}{5}$ of $\frac{1}{2}$ of x = 20 $\frac{1}{5}$ × $\frac{1}{2}$ × x = 20 x = 200 ∴ 20% of 200 : = $\frac{20}{100}$ × 200 = 40

In a certain organisation, 40% employees are matriculates, 50% of the remaining are graduates and the remaining 180 are post-graduates. What is the number of graduate employees ?

(A) 180
(B) 240
(C) 300
(D) 360

Solution: Let the total number of employees be x Then, (100 - 50)% of (100 - 40)% of x = 180 50% of 60% of x = 180 $\begin{aligned} \Rightarrow (\frac{50}{100} \times \frac{60}{100} \times x) = 180 \\ \Rightarrow x = (\frac{180 \times 10}{3}) \\ \Rightarrow x = 600 \end{aligned}$ ∴ Number of graduate employees : $=$ 50% of 60% of x $\begin{aligned} = (\frac{50}{100} \times \frac{60}{100} \times 600) \\ = 180 \end{aligned}$

40% of 60% of 32% of an amount is Rs. 432. What is the amount ?

(A) Rs. 5000
(B) Rs. 5600
(C) Rs. 6400
(D) None of these

Solution: Let the required amount be Rs. x Then, 40% of 60% of 32% of x = 432 ⇒ $\frac{40}{100} \times \frac{60}{100} \times \frac{32}{100}$ × $x$ = 432 ⇒ x = $\frac{432 \times 100 \times 100 \times 100}{40 \times 60 \times 32}$ ⇒ x = 5625

Two numbers are respectively 25% and 60% more than a third number. The ratio of the two numbers is:

(A) 20 : 30
(B) 20 : 35
(C) 25 : 32
(D) 21 : 31

Solution: $\begin{matrix} I & II & III \\ 125 & : & 160 & 100 \\ 25 & : & 32 \end{matrix}$

In the last financial year, a car company sold 41800 cars. In this year, the target is sale 51300 cars. By what percent must the sale be increased ?

(A) $11 \frac{9}{22}$ %
(B) $8 \frac{9}{22}$ %
(C) $8 \frac{11}{23}$ %
(D) $22 \frac{8}{11}$ %

Solution: Percentage increase : = $\frac{51300 - 41800}{41800}$ × 100 = $\frac{9500}{41800}$ × 100 = $\frac{9500}{418}$ = $\frac{500}{22}$ = $\frac{250}{11}$ = $22 \frac{8}{11}$ %

One-fifth of half of a number is 20. Then 20% of that number is :

(A) 80
(B) 60
(C) 20
(D) 40

The population of a town increases every year by 4%. If population was 50000 in starting, then after two years will be :

(A) 53900
(B) 54000
(C) 54080
(D) 54900

Solution: 4% = $\frac{1}{25}$ $\begin{matrix} Initial Final \\ 25 26 \\ 25 26 \\ \overset{―}{625 676} \end{matrix}$ According to the question, 625 units = 50000 1 unit = $\frac{50000}{625}$ = 80 676 units = 80 × 676 = 54080 Hence, population after two years = 54080

A papaya tree was planted 2 years ago. It grows at the rate of 20% every year. If at present, the height of three is 540 cm, what was it when the tree was planted ?

(A) 324 cm
(B) 375 cm
(C) 400 cm
(D) 432 cm

Solution: Height of the tree 2 years ago : $\begin{aligned} = \frac{540}{{(1 + \frac{20}{100})}^{2}} c m \\ = (540 \times \frac{5}{6} \times \frac{5}{6}) c m \\ = 375 c m \end{aligned}$

In an examination, 5% of the applicants were found ineligible and 85% of the eligible candidates belonged to the general category. If 4275 eligible candidates belonged to other categories, then how many candidates applied for the examination?

(A) 30000
(B) 35000
(C) 37000
(D) 39000

Solution: $\begin{aligned} Let the total number of applicants be x . \\ Number of eligible candidates \\ = 95 % o f x \\ Eligible candidates of other categories, \\ = 15 % o f (95 % o f x) \\ = \frac{15}{100} \times \frac{95}{100} \times x \\ = \frac{57}{400} x \\ o r, (\frac{57}{400}) x \\ x = \frac{4275 \times 400}{57} \\ = 30000 \end{aligned}$

10.

The sum of two numbers is 520. If the bigger number is decreased by 4% and the smaller number is increased by 12% then the numbers obtained are equal. The smaller number is :

(A) 280
(B) 240
(C) 210
(D) 300

Solution: Let the bigger number is a and the smaller number is (520 - a) According to the question, a × $\frac{(100 - 4)}{100}$ = (520 - a) × $\frac{(100 + 12)}{100}$ $\frac{96 a}{100}$ = (520 - a) $\frac{112}{100}$ 96a = (520 - a) 112 13a = 3640 a = 280 Hence, bigger number = 280 Smaller number = (520 - 280) = 240

«
1
2
3
4
5
6
7
8
9
10
...
57
58
Next ›
Last »

Indian Polity Mcq IAS GK Question India GK World GK GK questions GK Quiz Biology GK Science GK Physics GK Chemistry GK General Awareness Computer GK Political GK Indian Political GK Economics GK History GK Sports GK Geography GK Teaching Aptitude GK CTET/TET GK B Ed Entrance GK Banking GK SSC GK UPSC GK Indian Army GK Hindi Grammar GK Hindi Grammar MCQ Reasoning questions Bihar GK Rajasthan GK Jharkhand GK MP GK UP GK Chhattisgarh GK Haryana GK HP GK Maharashtra GK Electronics GK Agriculture GK States/Capitals GK Books Name & Author Arthimetic Verbal Reasoning Non Verbal Reasoning English

Practice MCQ Questions and Answer on Percentage

General Knowledge