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 +2.3
+0.1
Salisbury 10 Bev Facey 8 +0.7
Week of 10/10100.0*Chance in playoffs100.0*Average seed
Jasper Place 63 Ross Shep 10 Out
-0.4
Salisbury 21 AOB 14 +4.6
+0.1
Bev Facey 31 Harry Ainlay 28 +1.2
Week of 10/17None
Games Above .500
Chance Will Make Playoffs