How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 10/3100.0*Chance in playoffs100.0*Average seed
Spruce Grove 52 Jasper Place 27 +11.8
+0.9
Week of 10/10100.0*Chance in playoffs100.0*Average seed
Bellerose 14 Spruce Grove 31 In
+1.1
Salisbury 21 AOB 14 +2.0
+0.2
Bev Facey 31 Harry Ainlay 28 -0.2
Week of 10/17100.0*Chance in playoffs100.0*Average seed
Spruce Grove 49 Bev Facey 6 +0.6
Salisbury 20 Harry Ainlay 29 +0.1
Games Above .500
Chance Will Make Playoffs