Answer:

Explanation:
From the question,the left cup of dip is

Jim divides 6/7 cup of the left over ,5/6 dip between 3 friends
This implies that,

We first simplify what is in the bracket to obtain

we now reciprocate 3 and change the division symbol to multiplication
This implies that,

Hence each friend of Jim receives 5/21 cup of the left over dip