How are these numbers calculated?

Big Games

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

Week of 8/12100.0*Chance in playoffs100.0*Average seed
Port Adelaide 54 Melbourne 94 +0.7
+0.7
Hawthorn 96 North Melbourne 57 +0.2
St Kilda 76 Sydney 146 +0.1
+0.1
Bulldogs 95 Collingwood 92 +0.1
Week of 8/20100.0*Chance in playoffs100.0*Average seed
Carlton 78 Melbourne 58 Out
-1.2
North Melbourne 76 Sydney 85 +6.3
+0.1
Richmond 46 St Kilda 55 -0.2
Port Adelaide 94 Adelaide 109 +0.3
Week of 8/26100.0*Chance in playoffs100.0*Average seed
Geelong 155 Melbourne 44 -0.4
St Kilda 161 Brisbane 103 -0.1
Games Above .500
Chance Will Make Playoffs