How are these numbers calculated?

Big Games

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

Week of 11/14100.0*Chance wins title100.0*Average seed
Joinville 3 Ponte Preta 1 +24.4
+0.3
Boa Esporte 1 Joinville 0 -15.6
-0.2
Ponte Preta 2 America-RN 2 +11.5
+0.1
Week of 11/21None
Week of 11/29100.0*Chance wins title100.0*Average seed
Oeste 1 Joinville 0 -24.0
-0.2
Nautico 1 Ponte Preta 1 Yes
+0.1
Points
Chance Will Win Championship