Question

There are seventy two students in our class . Eight ninth of the students are boys . how many girls are in our class

Answer 1

Total no. of students = 72
No. of Boys = 8 upon 9th of total
                    = 8 upon 9 × 72
                    = 64 boys is the answer
∴ No. of Girls= 64 - 72 = 8 girls is the answer
No. of boys is 64 and no. of girls is 8

Answer 2

We'll first take out 8/9 part of 72:-
8/9*72= 64

There are 64 boys in the class.

So there are (72-64)= 8 girls