How are these numbers calculated?

Big Games

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

Week of 10/20100.0*Chance in playoffs100.0*Average seed
Calgary 7 Saskatchewan 30 In
+0.2
BC 29 Edmonton 35 (ot)-0.1
Week of 10/27100.0*Chance in playoffs100.0*Average seed
Saskatchewan 37 Montreal 12 +0.0
Week of 11/3100.0*Chance in playoffs100.0*Average seed
Saskatchewan 13 Edmonton 28 -0.5
Games Above .500
Chance Will Make Playoffs