How are these numbers calculated?

Big Games

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

Week of 7/21100.0*Chance in playoffs100.0*Bye To Finals100.0*Average seed
Botany 2 Dunedin 8 -30.8
-1.0
-0.4
Botany 5 Dunedin 6 -19.5
-2.3
-0.3
Dunedin 1 Skycity 5 +15.0
No
+0.1
Skycity 13 Canterbury 4 -0.6
-0.5
Week of 7/28100.0*Chance in playoffs100.0*Bye To Finals100.0*Average seed
West Auckland 6 Botany 0 -22.9
-0.2
Dunedin 4 Skycity 5 +20.2
+0.2
West Auckland 6 Botany 3 -18.2
-0.2
Week of 8/4100.0*Chance in playoffs100.0*Bye To Finals100.0*Average seed
Botany 0 Skycity 7 Out
-0.2
Points
Chance Will Make Playoffs