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
Skycity 13 Canterbury 4 +1.4
+14.4
+0.2
Dunedin 1 Skycity 5 In
+15.7
+0.2
Botany 5 Dunedin 6 -0.6
+0.9
Botany 2 Dunedin 8 -0.4
+0.6
Week of 7/28100.0*Chance in playoffs100.0*Bye To Finals100.0*Average seed
West Auckland 6 Botany 0 -15.4
-0.2
Dunedin 4 Skycity 5 +14.3
+0.1
West Auckland 6 Botany 3 -14.2
-0.1
Week of 8/4100.0*Chance in playoffs100.0*Bye To Finals100.0*Average seed
Botany 0 Skycity 8 +31.8
+0.3
Canterbury 1 West Auckland 6 -26.3
-0.3
Botany 0 Skycity 7 +22.5
+0.2
Canterbury 4 West Auckland 5 -20.4
-0.2
Points
Chance Will Make Playoffs