How are these numbers calculated?

Big Games

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

Thursday100.0*Chance in playoffs100.0*Average seed
Columbus 2 Pittsburgh 3 +28.1
+0.9
Florida 3 Boston 2 -9.7
-0.2
Detroit 2 Montreal 4 -7.2
-0.2
NY Islanders 2 NY Rangers 1 -6.8
-0.2
New Jersey 4 Toronto 1 +5.0
+0.2
Friday100.0*Chance in playoffs100.0*Average seed
Pittsburgh 3 Ottawa 2 (so)In
+1.0
SaturdayNone
Points
Chance Will Make Playoffs