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 -15.3
-1.1
Salisbury 10 Bev Facey 8 +3.5
+0.2
Week of 10/10100.0*Chance in playoffs100.0*Average seed
Jasper Place 63 Ross Shep 10 In
+0.5
Bev Facey 31 Harry Ainlay 28 -4.6
-0.1
Salisbury 21 AOB 14 +2.9
+0.2
Bellerose 14 Spruce Grove 31 +2.1
+0.0
Week of 10/17100.0*Chance in playoffs100.0*Average seed
Bellerose 7 Jasper Place 30 +0.8
Salisbury 20 Harry Ainlay 29 -0.5
Spruce Grove 49 Bev Facey 6 +0.5
Games Above .500
Chance Will Make Playoffs