Allison ran 3 1/2 miles on Saturday and 1 3/4 miles on Sunday. How much farther did she run on Saturday than on Sunday?
3 1/2 - 1 3/4 =
7/2 - 7/4 =
14/4 - 7/4 = (14-7)/4 = 7/4 = 1 3/4 miles farther
+36916 
