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
Saskatchewan 2 Calgary 3 (ot)-13.8
-0.1
Lethbridge 4 Regina 1 +12.5
+0.3
Lethbridge 4 Regina 3 +11.2
+0.2
Saskatchewan 2 Calgary 1 (ot)+0.8
Week of 2/19100.0*Chance in playoffs100.0*Average seed
Calgary 3 UBC 1 -12.8
-0.1
Calgary 3 UBC 2 -12.6
-0.1
Week of 2/27100.0*Chance in playoffs100.0*Average seed
Lethbridge 2 Saskatchewan 3 (ot)Out
-0.4
Points
Chance Will Make Playoffs