Puppies to Dogs

Question

At a certain animal shelter, the ratio of puppies to adult dogs is 7 to 4. This week there are a total of 55 dogs in the shelter. How many puppies are in the shelter? How many adult dogs are in the shelter?

Answer 1

p/d = 7/4

p/55 = 7/(7+4) = 7/11

p/5 = 7

p = 35 puppies

d = 55-35 = 20 adult dogs