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
+18.7
+1.0
St Kilda 76 Sydney 146 In
-2.9
-0.1
Hawthorn 96 North Melbourne 57 +0.1
-1.8
Bulldogs 95 Collingwood 92 -1.7
-0.2
Richmond 78 Geelong 82 -3.8
-0.2
Fremantle 70 Adelaide 142 -3.6
-0.1
Week of 8/20100.0*Chance in playoffs100.0*Top 4100.0*Average seed
GWS 129 Fremantle 37 -4.9
-0.2
Brisbane 69 Geelong 129 -4.6
-0.2
Port Adelaide 94 Adelaide 109 -4.5
-0.2
North Melbourne 76 Sydney 85 -2.9
-0.2
Essendon 53 Bulldogs 93 -0.3
-0.1
Week of 8/26100.0*Chance in playoffs100.0*Top 4100.0*Average seed
Adelaide 71 West Coast 100 +30.9
+1.2
Geelong 155 Melbourne 44 No
-0.3
North Melbourne 63 GWS 100 No
-0.5
Hawthorn 112 Collingwood 111 -9.2
-0.2
Sydney 164 Richmond 51 -3.2
-0.1
Games Above .500
Chance Will Make Playoffs