Question 894133
First divide 18 by 15 to determined the equivalent number of children per 1 adult, 18/15 = 1.2
Now 12 children are on the the elevator so 18 - 12 = 6 remaining children, divide this number by 1.2 to get the number of adults allowed on the elevator, 6/(1.2) = 5 adults can get on the elevator