Answer:
Newfoundland
Explanation:
Let's take a look at both locations and find their eastern-most point.
Newfoundland:
we'll take the capital (St. John's) in reference because it's pretty much the eastern-most point.
Latitude: 47.4815685
Longitude: -53.1085765
Now, let's look at Puerto Rico:
we'll take the Punta del Este, on the island Culebrita:
Latitude: 18.312056
Longitude: -65.220939
To see which is the farther East (we'll assume from continental USA), we need to look at the longitudes, which are the vertical lines on the globe.
Since Newfoundland is at -53 degrees, and Puerto Rico is at -65 degrees, Newfoundland is closer to the Longitude 0 (Greenwich), so it's the one farther East from the continental USA.
