Answer:
4 11/20
Step-by-step explanation:
The length of road unpaved is 7 3/10 less 2 3/4 miles The LCD of the fractions is 20 (both 10 and 4 divide evenly into 20).
Thus, the problem becomes 7 6/20 - 2 15/20.
We have to borrow 1 from that 7 because 15/20 is larger than 6/20. This results in
6 26/20 - 2 15/20, or
4 11/20