How are these numbers calculated?

Big Games

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

Week of 9/20100.0*Chance in playoffs100.0*Average seed
Indy 1 Saint Louis 1 +3.7
+0.0
Week of 9/30100.0*Chance in playoffs100.0*Average seed
Indy 1 Kansas City II 2 +26.5
+0.3
Week of 10/3100.0*Chance in playoffs100.0*Average seed
Saint Louis 2 Indy 1 In
+0.5
Points
Chance Will Make Playoffs