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*Top 4100.0*Average seed
GWS 96 West Coast 97 In
+9.6
+0.7
St Kilda 76 Sydney 146 In
-0.6
-0.0
Hawthorn 96 North Melbourne 57 +0.0
-0.5
+0.1
Fremantle 70 Adelaide 142 -0.8
-0.0
Richmond 78 Geelong 82 -0.7
-0.0
Bulldogs 95 Collingwood 92 -0.5
-0.1
Week of 8/20100.0*Chance in playoffs100.0*Top 4100.0*Average seed
Port Adelaide 94 Adelaide 109 -9.7
-0.2
North Melbourne 76 Sydney 85 -1.1
Brisbane 69 Geelong 129 -0.1
GWS 129 Fremantle 37 -0.1
Week of 8/26100.0*Chance in playoffs100.0*Top 4100.0*Average seed
Adelaide 71 West Coast 100 +11.2
+1.2
Geelong 155 Melbourne 44 No
-0.1
North Melbourne 63 GWS 100 No
-0.7
Hawthorn 112 Collingwood 111 -0.1
Games Above .500
Chance Will Make Playoffs