## Fractions

#### Fractions

1. 0.8 x ? =0.0004
1. .0005
2. .005
3. .5
4. .00005

1. Let 0.8y = 0.0004
Then,y = 0.0004 / 0.8

##### Correct Option: A

Let 0.8y = 0.0004
Then,y = 0.0004 / 0.8
= 0.004 / 8
= .0005

1. 0.9 x 0.008=?
1. 0.072
2. 0.0072
3. 0.00072
4. .72

1. ∵ 9 x 8=72
∴ 0.09 x 0.008 = 0.00072 (Five place of decimal )

##### Correct Option: C

∵ 9 x 8=72
∴ 0.09 x 0.008 = 0.00072 (Five place of decimal )

1. ? % of 10.8 =32.4
1. 3
2. 30
3. 300
4. 0.3

1. Let k % of 10.8=32.4
⇒ (k x 10.8) / 100 = 32.4

##### Correct Option: C

Let k % of 10.8=32.4
⇒ (k x 10.8) / 100 = 32.4
⇒ k = (32.4 x 100 )/10.8
= 300

1. ? / .0025 = 800
1. .2
2. .02
3. 2000
4. 2

1. Let k / .0025=800
Then, k = 800 x .0025

##### Correct Option: D

Let k / .0025=800
Then, k = 800 x .0025
= ( 800 x 25 ) / 10000
= 2

1. 0.001 / ? = 0.01
1. 10
2. .1
3. .01
4. .001

1. Let 0.001 / x = 0.01
Then , x = 0.001 / 0.01

##### Correct Option: B

Let 0.001 / x = 0.01
Then , x = 0.001 / 0.01
= 0.001 / 0.010
= 1 / 10
= 0.1