Question

In a school 5/7 of the students are boys if there are 300 girls find the number of boys in the school
How we got 2/7

Answer 1

Imagine , total students are x.

2/7 are girls

so, x×2/7 = 300

or, x = 1050

So the number of the boys are 1050-300= 750

Answer 2

That's you're answer