18 as a decimal? 0.375 0.247 0.214 0.125 Here 1 8 in decimal means 8th part in 1

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Home ‣ Aptitude ‣ Decimal Fraction Comments

Question
18 as a decimal?
Options
A. 0.375
B. 0.247
C. 0.214
D. 0.125

Correct Answer

0.125

Explanation

Here $\frac{1}{8}$ in decimal means 8th part in 1.

We know that $\frac{1}{10}$ = 0.1

Then, $\frac{1}{8} = ?$

=> $? = \frac{\frac{1}{8} x 0.1}{\frac{1}{10}} = \frac{0.1 x 10}{8} = \frac{0.5}{4} \frac{1}{8} = 0.125$

Decimal Fraction problems

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1. What will come in place of question mark (?) in the following number series? 4, 3, 4, 7, 15, ?
Options
A. 42
B. 44
C. 53
D. 56

Discuss

Correct Answer: 44

Explanation:

4 3 4 7 15 ?
�1-1 �1+1 �2-1 �2+1 �3-1

15x3 - 1 = 45 - 1 = 44

2. What will be the value of 25.7322-15.7322
Options
A. 214.64
B. 314.64
C. 414.64
D. 412.64

Discuss

Correct Answer: 414.64

Explanation:

Can be easily solved with following formula

$(a^{2} - b^{2}) = (a - b) � (a + b)$

= (25.732 - 15.732 ) x (25.732 + 15.732)

=414.64

3. The number 0.127 is how much greater than 1/8 ?
Options
A. 1/100
B. 1/1500
C. 1/2
D. 1/500

Discuss

Correct Answer: 1/500

Explanation:

0.127 expressed as a fraction = 127/1000

1/8 can also be expressed as (1 x 125) / (8 x 125) = 125/1000

The difference is 2/1000, which is 1/500

4. When 52416 divided by 312 , the quotient is 168. What will be the quotient when 52.416 is divided by 0.0168 ?
Options
A. 3120
B. 32.10
C. 321.0
D. 3.120

Discuss

Correct Answer: 3120

Explanation:

Given, 52416 / 312 = 168.

<=> 52416 / 168 = 312.

52.416 / 0.0168 = 524160 / 168 = 3120.

5. Correct expression of 6.46 is
Options
A. 640/99
B. 640/90
C. 64000/99
D. 640/9

Discuss

Correct Answer: 640/99

Explanation:

$6.46 = 6 + 0.46 = 6 + (\frac{46}{99}) \frac{(594 + 46)}{99} = > \frac{640}{99}$

6. Express 3/8 and 1/10 as a Decimals?
Options
A. 1.375 & 1
B. 0.375 & 1
C. 13.75 & 1.1
D. 0.375 & 0.1

Discuss

Correct Answer: 0.375 & 0.1

Explanation:

3/8 as a Decimal :

In this we should convert the denominator into 10, 100, 1000, 10000, 100000,... to make it simple.

Now to make 8 into 1000, we multiply numerator and denominator with 125

=> $\frac{3 x 125}{8 x 125} = \frac{375}{1000} = 0.375$

1/10 as a Decimal :

1 divided into 10 parts of each 0.1.

Therefore, 3/8 = 0.375 and 1/10 = 0.1 in decimals.

7. 3/4 divided by 2 is
Options
A. 3/2
B. 2/3
C. 8/3
D. 3/8

Discuss

Correct Answer: 3/8

Explanation:

3/4 divided by 2

= 3/4/2

= 3/4x2

= 3/8.

Hence, 3/4 divided by 2 is equal to 3/8.

8. 3/8 as a decimal
Options
A. 1.375
B. 2.375
C. 0.375
D. 3.75

Discuss

Correct Answer: 0.375

Explanation:

Expressing 3/8 as a decimal fraction:

We can convert 3/8 into a decimal fraction by just dividing 3 by 8 or making 3 into 8 parts.

Then, it is 3/8 = 0.375 as a decimal fraction.

Other Method::

3/8 as a Decimal :

In this we should convert the denominator into 10, 100, 1000, 10000, 100000,... to make it simple.

Now to make 8 into 1000, we multiply numerator and denominator with 125

=> ( $\frac{3 x 125}{8 x 125} = \frac{375}{1000} = 0.375$

9. Which of the following fraction is the largest?
Options
A. 7/12
B. 9/16
C. 13/20
D. 32/80

Discuss

Correct Answer: 7/12

Explanation:

Here to say which fraction is greater from the given options, the fraction with greater numerator with same denominator or smaller denominator with same numerator.

To find the greater fraction, among the given options, make the denominators same for the options by finding the LCM of all the denominators.

7/12, 9/16, 13/20, 32/80

Now, LCM of 12, 16, 20, 80 = 240.

Then,

140/240, 135/240, 156/240, 96/240

Here

$\frac{156}{240} > \frac{140}{240} > \frac{135}{240} > \frac{96}{240} = > \frac{13}{20} > \frac{7}{12} > \frac{9}{16} > \frac{32}{80}$

Hence, largest fraction = 13/20.

10. 3/5 as a decimal fraction?
Options
A. 0.25
B. 0.45
C. 0.60
D. 0.75

Discuss

Correct Answer: 0.60

Explanation:

Given fraction is 3/5

Now, multiply with 2 for numerator and denominator

we get,

3/5 x 2/2 = 6/10

When we divide, 6 with 10, we get 0.6 as quotient.

Hence, 3/5 as a decimal fraction is 0.6.

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