How are these numbers calculated?

Big Games

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

Week of 11/5100.0*Chance wins title100.0*Average seed
Jets 1 Hawks 9 +2.2
Manakau 1 Jets 5 No
+0.0
Paekakariki 1 Jets 2 No
+0.1
Otaki 3 Paekakariki 3 -0.5
+0.1
Hawks 1 Otaki 2 +0.3
+0.1
Masters 5 Otaki 7 +0.2
+0.1
Paekakariki 3 Masters 2 -0.1
Points
Chance Will Win Championship