Answer:
3/10 of the total distance to her grandmother's house was traveled on Sunday
Explanation:
Carly's family traveled distance of Saturday =

Remaining distance =

They traveled 3/7 of the remaining distance on Sunday.
So, Distance traveled on Sunday =

Distance traveled on Sunday =

Fraction of the total distance to her grandmother's house was traveled on Sunday =

Hence 3/10 of the total distance to her grandmother's house was traveled on Sunday