Answer: the owner uses 3 1/4 pounds of dog food when feeding 3/8 of an 8 2/3 pound bag.
To calculate how much dog food the owner uses when feeding 3/8 of an 8 2/3 pound bag, follow these steps:
1. Convert the mixed number to an improper fraction:
2. Calculate the amount of dog food used:
Therefore, the owner uses 3 1/4 pounds of dog food when feeding 3/8 of an 8 2/3 pound bag.