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
Sao Paulo 3 America-MG 1 +2.2
-0.3
Gremio 1 Ceara 3 +0.5
-0.2
Vasco da Gama 2 Avai 0 +0.0
Week of 11/27100.0*Serie B100.0*Average seed
America-MG 2 Atletico-PR 1 +0.3
Coritiba 1 Avai 0 +0.0
Week of 12/4100.0*Serie B100.0*Average seed
Atletico-GO 5 America-MG 1 -0.4
Atletico-PR 1 Coritiba 0 -0.2
Bahia 2 Ceara 1 +0.2
Points
Chance Will Win Championship