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*Average seed
Gremio 1 Ceara 3 -0.4
Corinthians 2 Atletico-MG 1 +0.1
Bahia 0 Palmeiras 2 -0.1
Atletico-GO 0 Flamengo 0 +0.1
Week of 11/27100.0*Average seed
Palmeiras 1 Sao Paulo 0 -0.3
Atletico-MG 4 Botafogo 0 -0.1
Gremio 2 Atletico-GO 2 +0.0
Week of 12/4100.0*Average seed
Internacional 1 Gremio 0 -0.6
Cruzeiro 6 Atletico-MG 1 +0.1
Corinthians 0 Palmeiras 0 +0.0
Points
Chance Will Win Championship