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!!
