Answer:
6 1/4 pounds
Explanation:
he has 7 1/2 pounds of meatballs
he cooks 1 1/4 pounds
convert 7 1/2 to fourths
1/2 x 2/2
7 2/4
then subtract the amount he used from the total amount
7 2/4 - 1 1/4
6 1/4
that is how much he had left over, or how much he froze