To find out how much money Reem has after paying her friend back, we will subtract the amount she owes from the amount she earns.
- Reem's earnings: $43.78
- Amount owed to her friend: $15.25
Now, we'll calculate how much she has left after paying her friend:
\[ 43.78 - 15.25 = 28.53 \]
After paying her friend back, Reem has $28.53.