1. 15% of the toddlers in a preschool class drink water with their lunch. How

many toddlers are in the class if 3 drinks water with their lunch?

(a) write a proportion for the situation

(b) Solve the problem. Show your work.

If 15% drink water 85% don't (15%+85%=100%) so we can also express this as a ratio of:

15:85 which reduced is:

3:17

From the above we know that if 3 drink water that 17 don't which means that there are 3+17=20 students in the class.