Please helppp fasssttt plzzz

Which expression will have the same sum as 3_8 + 1/4?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

Can someone me out here and the tell me the greatest common factor