A pet store owner has 12 cats and 20 dogs. They want to have 20% more cats than dogs. How many dogs do they have to sell to achieve their goal of having 20% more cats than dogs assuming they do not sell any cats in this time. Choose the correct choice
A) 6
B) 8
C) 10
D) 12
E) 14
You can use basic arithmetic to solve the answer by testing each of the possible answers.   Lets test C:   if they sold 10 dogs they would have 12 cats and 10 dogs and a total of 22 pets   12/22= 54.5%   10/22= 45.5%   for a difference of 9%   lets test 12:   if they sold 12 dogs they would have 12 cats and 8 dogs and a total of 20 pets   12/20=60%   8/20=40%   for a difference of 20%   The answer is 12
<result>D</result>
A pet store owner has 12 cats and 20 dogs. They want to have 20% more cats than dogs. How many dogs do they have to sell to achieve their goal of having 20% more cats than dogs assuming they do not sell any cats in this time.