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
