Question

the ratio of boys and girls in the class is 7:5....find the percentage of boys in the class?

Answer 1

Let the ratio be 7x and 5x

Then

Total students in class=12x

7x*100/12x


58.33

Answer 2

let the common multiple be x
7x + 5x = 12x is total no. of students
7x/12x * 100= 58.33%