How are these numbers calculated?

Big Games

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

Tuesday, 3/15100.0*Chance in playoffs100.0*Average seed
Islanders 1 Squares 3 -18.5
-0.4
Princes 2 Dynasty 1 +8.5
+0.1
Thursday, 3/17100.0*Chance in playoffs100.0*Average seed
Islanders 11 Squares 1 In
+0.4
Princes 2 Dynasty 1 -25.0
-0.3
Points
Chance Will Make Playoffs