Answer:
Brandon has
of the chocolate left with him.
Explanation:
Step 1: Identify the fractions
Colton is given one of the seven pieces, so he has
of the chocolate.
Jill is given three of the seven pieces, so she has
of the chocolate.
Brandon himself had seven pieces at the beginning, so he had
(the whole) of the chocolate.
Step 2: Do calculations with the fractions
Collectively, Colton and Jill have taken:
So, the fraction that Brandon has currently is:
Brandon has
of the chocolate left with him.