How are these numbers calculated?

Big Games

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

Thursday, 5/18100.0*Chance in playoffs100.0*Average seed
Pirates 1 Coconut Pete 4 +24.0
+1.3
Friday, 5/19100.0*Chance in playoffs100.0*Average seed
Icebears 4 Coconut Pete 2 -25.3
-1.5
Icebears 4 Pirates 4 +8.0
+0.1
Saturday, 5/20100.0*Chance in playoffs100.0*Average seed
Lavage CL 6 Coconut Pete 10 In
+2.3
Lavage CL 3 Icebears 7 -0.9
Dragons 4 Top Shelf Mofos 8 -0.3
Physio C 2 Whalers 9 +0.1
Whalers 6 Top Shelf Mofos 2 +0.0
Points
Chance Will Make Playoffs