How are these numbers calculated?

Big Games

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

Week of 2/12100.0*Chance in playoffs100.0*Average seed
Lethbridge 4 Regina 1 -8.5
-0.3
Saskatchewan 2 Calgary 3 (ot)-5.2
-0.1
Lethbridge 4 Regina 3 -2.0
-0.2
Saskatchewan 2 Calgary 1 (ot)-0.2
Week of 2/19None
Week of 2/27None
Points
Chance Will Make Playoffs