Consider a school which has 150 girls and 120 boys find the following ratios : girls : boys , girls : students

Ratios can be written in 3 ways. 

1. a to b

2. a:b

3. a
   
    b
Now for ur question we will do it in the order of the question.

girls to boys

There are 150 girls and 120 boys. So we would write this like:-

150 to 120

150:120

 150

 120

Girls to students:- 

There are 150 girls, and in total there are students.

Lets find the amount of students.

150 + 120 = 270

So, 150 girls and 270 students.

150 to 270

150:270

 150 

 270

So, The ratios are ;-

Girls to boys:- 150:120

Girls to students:- 150:270

Hope I helped ya!!