How are these numbers calculated?

Big Games

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

Week of 8/13100.0*Chance in playoffs100.0*Average seed
Hawks 99 Demons 78 Out
-0.5
Blues 156 Tigers 67 -2.9
-0.1
Dockers 87 Swans 96 -2.8
-0.1
Kangaroos 63 Saints 115 +1.5
+0.1
Power 61 Eagles 60 -0.1
Bombers 64 Magpies 162 +0.0
Week of 8/20100.0*Chance in playoffs100.0*Average seed
Power 112 Demons 83 -0.7
Eagles 94 Kangaroos 110 -0.1
Magpies 54 Crows 51 +0.1
Week of 8/27100.0*Chance in playoffs100.0*Average seed
Crows 65 Saints 37 -0.4
Demons 103 Kangaroos 113 -0.3
Tigers 112 Power 122 -0.2
Games Above .500
Chance Will Make Playoffs