Step-by-step explanation:

HEY THERE!!
FIRST STEP :- Affonso has 14 fewer dimes than nickels.
SECOND STEP:- Nickels has 21 dimes.
so Affonso has nickels:-
21 - 14 = 7
Hope it helps you.
Each portion will weigh 0.079lbs.
5/6-1/5=?
.833-.2=.633
.633÷8=.079lbs.