On a field trip, 2 chaperones are needed for every 8 students. How many chaperones are needed for a trip with 160 students? Use the ratio table given to solve the problem.

2 chaperones for 8 students = 1 chaperone for 4 students

160/4 = 40 ... so that means 40 chaperones for 160 students

another way to do this ...

2/8 = x / 160 ... 2 chaperones to 8 students = x chaperones to 160 students

cross multiply

(8) (x) = (160) (2)

8x = 320

x = 320/8

x = 40 chaperones