Question

you make a large bowl of salad to share with your friends your brother eats 1/3 of the event before they come over. you want to divide the leftover salad evenly among six friends what expression describes the situation

Answer 1

(1 - 1/3)/6 of the original salad for each of the 6 friends

or, think of it this way:

divide the original into 9 equal parts
brother eats 3 of those or 1/3 of the salad
leaving you with 6 pieces of the original 9
or 1/9 for each of the 6 friends

Answer 2

A.1-1/3/6
B.1/6