Question

divide 300 in two parts such that the ratio of the parts be 7.8

Answer 1

Whenever you have to solve such question, then make sure you consider the parts as a variable multiplied with the ratio.

Here,
Ratio = 7:8
So we will assume the parts to be 7x and 8x respectively.

Now,
7x + 8x = 300
15x = 300
x = 300/15

On solving we get,
x = 20

Hence,
The two parts are,
7x and 8x
7*20 and 8*20
140 and 160

Answer 2

Given :

Ratio = 7 : 8

Let the ratio is 7x : 8x

Given : 300

According to the given question

7x + 8x = 300

15 x = 300

X = 300/15

X = 20

Finding the ratio :

7x = 7(20) = 140

8x = 8(20) = 160

Hence , 140 : 160 = 7 : 8.

$\bold{Answer \: = \: 140 \: : \: 160}$