How are these numbers calculated?

Big Games

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

Week of 10/14100.0*Chance in playoffs100.0*Average seed
Toronto 40 Ottawa 27 +0.0
Week of 10/20100.0*Chance in playoffs100.0*Average seed
BC 16 Calgary 41 -45.3
-0.5
Saskatchewan 26 Toronto 29 Out
-0.1
Games Above .500
Chance Will Make Playoffs