How are these numbers calculated?

Big Games

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

Week of 8/9100.0*Chance in playoffs100.0*Average seed
Syd Ice Dogs 2 Perth 8 -11.7
-0.3
Syd Bears 0 Syd Ice Dogs 8 +9.2
+0.2
Melb Ice 4 Adelaide 2 +7.3
Melb Ice 3 Adelaide 1 +5.6
Newcastle 6 Syd Bears 2 -0.3
Newcastle 5 Perth 4 -0.2
CBR 2 Melb Mustangs 4 +0.2
Week of 8/16100.0*Chance in playoffs100.0*Average seed
Perth 3 Syd Ice Dogs 6 In
+0.3
Adelaide 6 CBR 2 -12.3
-0.1
Adelaide 5 CBR 2 -11.3
-0.1
Perth 1 Syd Ice Dogs 3 +8.4
+0.1
Melb Mustangs 6 Newcastle 3 +2.6
Week of 8/23100.0*Chance in playoffs100.0*Average seed
Syd Bears 2 CBR 3 -0.1
Points
Chance Will Make Playoffs