How are these numbers calculated?

Big Games

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

Week of 11/20100.0*Serie B100.0*Average seed
Atletico-MG 2 Juventude 0 -0.4
Chapecoense 1 Gremio 3 +0.4
-0.1
Santos 2 Fortaleza 0 +0.3
Bahia 3 Gremio 1 +0.2
Corinthians 2 Santos 0 -0.2
Gremio 2 Flamengo 2 -0.1
Atletico-GO 1 Juventude 1 -0.1
Sao Paulo 0 Athletico-PR 0 +0.1
Bahia 0 Cuiaba 0 -0.1
Week of 11/27100.0*Serie B100.0*Average seed
Sao Paulo 2 Sport Recife 0 +2.3
-0.2
Juventude 1 Bragantino 0 Yes
Gremio 3 Sao Paulo 0 -0.1
Sport Recife 1 Flamengo 1 -0.0
Week of 12/5None
Points
Chance Will Win Championship