Answer: There are 144 cats
Explanation:
Step 1 : the ratio of dogs to cats was 4 to 9. This means for every 4 dogs there are 9 cats.
Step 2 : There are 64 dogs. Therefore we want to find out how many groups of 4 we can get out of 64. Divide 64/4= 16.
Step 3 : 9 * 16 = 144 cats