How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

SaturdayNone
Sunday100.0*Pres Trophy100.0*Average seed
New York Islanders 4 New Jersey Devils 2 +21.1
+0.1
Edmonton Oilers 3 Vancouver Canucks 4 (so)-15.9
Washington Capitals 3 Boston Bruins 5 -1.2
-0.1
Monday100.0*Pres Trophy100.0*Average seed
Ottawa Senators 2 New York Islanders 1 -31.5
Vancouver Canucks 4 Edmonton Oilers 2 -20.8
Points
Chance Will Make Playoffs