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)+0.0
Saskatchewan 2 Calgary 1 (ot)-0.1
Week of 2/19100.0*Chance in playoffs100.0*Average seed
Saskatchewan 4 Manitoba 1 -0.4
-0.3
Calgary 3 UBC 2 -0.1
Saskatchewan 4 Manitoba 1 -0.1
-0.3
Week of 2/27100.0*Chance in playoffs100.0*Average seed
Lethbridge 2 Saskatchewan 3 (ot)-0.2
Manitoba 5 Regina 3 +0.1
Points
Chance Will Make Playoffs