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
Dockers 87 Swans 96 +8.1
+0.6
Blues 156 Tigers 67 -1.2
-0.1
Kangaroos 63 Saints 115 +0.5
Hawks 99 Demons 78 -0.2
Week of 8/20100.0*Chance in playoffs100.0*Average seed
Swans 114 Bulldogs 70 +0.3
Cats 121 Blues 79 +0.1
Hawks 155 Dockers 39 +0.1
Week of 8/27100.0*Chance in playoffs100.0*Average seed
Lions 68 Swans 106 +0.2
Hawks 98 Magpies 95 -0.2
Dockers 93 Blues 87 -0.1
Games Above .500
Chance Will Make Playoffs