<h2>Answer:</h2><h2>Samuel fell asleep after travelling 90 miles which is 15%of their total trip distance.</h2>
Step-by-step explanation:
The total length of the trip = 600 miles
Samuel fell asleep after they had travelled = 90 miles
Percentage of the total trip travelled when samuel fell asleep =
= 15%
Samuel fell asleep after travelling 90 miles which is 15%of their total trip distance.