Solve: Six and three sevenths minus one and three sixths equals blank A) five and seven thirteenths
B) five and thirty nine forty seconds
C) seven and seven thirteenths
D) seven and thirty nine forty seconds

4 13/16

Step-by-step explanation:

6 3/7 - 1 3/6 =

270/42  -   63/42 = 207/42 = 4 39/48 = 4 13/16

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour