School guidelines require that there must be at least 2 chaperones for every 25 students going on a school trip. how many chaperones must there be for 80 students?

2/25 = x/802 chaperones to 25 students = x chaperones to 80 students
cross multiply because this is a proportion
(25)(x) = (2)(80)
25x = 160
x = 160/25
x = 6.4so basically, since u cant have .4 of a person, we need to round up, so the school needs 7 chaperones for 80 students