How are these numbers calculated?

Big Games

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

Week of 11/9100.0*Average seed
Avai 1 Guarani 0 +0.2
Bragantino 1 Joinville 0 +0.2
Week of 11/17100.0*Average seed
Barueri 2 Avai 0 -0.3
Joinville 1 Vitoria 1 +0.1
Week of 11/23100.0*Average seed
Avai 1 Criciuma 1 -0.3
Goias 2 Joinville 1 +0.1
Points
Chance Will Win Championship