How are these numbers calculated?

Big Games

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

Week of 8/2100.0*Chance in playoffs100.0*League100.0*Average seed
West Auckland 2 Canterbury 5 -1.8
-0.1
West Auckland 5 Canterbury 7 -1.0
No
Dunedin 5 Botany 4 -0.3
No
+0.1
Dunedin 6 Botany 5 -0.2
-0.1
+0.1
Week of 8/9100.0*Chance in playoffs100.0*League100.0*Average seed
Botany 7 Southern 6 (ot)Out
-0.1
Canterbury 6 Dunedin 1 -0.1
Botany 1 Southern 4 +0.3
Week of 8/16None
Points
Chance Will Make Playoffs