For number 4 the equation is 12 divided by 3/4 and when you solve that you get 16 which is the answer. For question 5 the equation would be 40 5/8 divided by 4. The first to do this is make 40 5/8 an improper fraction which is 325/8. Then you would flip the 4/1(this is the same thing as 4) to get 1/4. Then you would multiply 325/8 * 4 to get 325/32 and as a mixed number 10 5/32 which is the answer.