ANSWER:
According to the vet healthy weight of the dog is 63 pounds.
SOLUTION:
Given, Sam's dog weighs 72 pounds.
The vet suggests that for the dog's health, its weight should decrease by 12.5 percent.
Now, we need to find the healthy weight of a dog.
Healthy weight of dog = present weight of dog – 12.5 percent of its present weight
Healthy weight = 72 – 12.5 % 72



= 72 – 9 = 63 pounds
Healthy weight of the dog is 63 pounds
Hence, according to the vet healthy weight of the dog is 63 pounds.