How are these numbers calculated?

Big Games

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

Week of 11/19100.0*Serie B100.0*Average seed
Gremio 1 Ceara 3 Yes
Vasco da Gama 2 Avai 0 Yes
Sao Paulo 3 America-MG 1 +0.0
Week of 11/27100.0*Serie B100.0*Average seed
Coritiba 1 Avai 0 -0.0
Week of 12/4None
Chance Will Win Championship