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
Paekakariki 1 Jets 2 No
-0.3
Paekakariki 3 Masters 2 +8.1
+0.3
Jets 1 Hawks 9 +7.8
+0.1
Manakau 1 Jets 5 -6.8
Otaki 3 Paekakariki 3 -4.6
-0.0
Hawks 1 Otaki 2 -0.4
-0.1
Masters 5 Otaki 7 -0.4
-0.1
Choppers 0 Manakau 8 -0.1
Manakau 3 Babas 0 -0.1
Points
Chance Will Win Championship