In a sample of patients at an animal hospital, 30 percent are cats and 60 percent are not dogs. What fraction of those patients who are not cats are dogs?
Pick one.
A) 1/7  B) 1/3  C) 2/5  D) 3/5  E) 4/7
Given :60% are not dogs, so 40% are dogs.   Cats are 30% so 70% are not cats.   Question is dogs to not cats=40/70 = 4/7   Answer is 4/7
<result>E</result>
In a sample of patients at an animal hospital, 30 percent are cats and 60 percent are not dogs. What fraction of those patients who are not cats are dogs?