4/6 divided by 2/6 is 2.
you multiply the 4/6 by 6/2 to get 24/12. You then simplify it and get 2 as your answer.
1. 24 students and 3 absent
24-3=21
so 21 student goes
2. 21 students divided by the 3 vans
equals to 7
so 7 student went in each van
I believe b is about 16.3, hope this helps