How are these numbers calculated?

Big Games

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

Week of 8/15None
Week of 8/22100.0*Chance in playoffs100.0*Average seed
Bombers 108 Suns 89 In
+0.7
Kangaroos 101 Crows 94 +2.7
-0.1
Giants 67 Magpies 75 -0.5
-0.0
Power 140 Blues 37 -0.0
Week of 8/29100.0*Chance in playoffs100.0*Average seed
Blues 90 Bombers 90 -0.0
Games Above .500
Chance Will Make Playoffs