How are these numbers calculated?

Big Games

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

Week of 2/6None
Week of 2/13100.0*Chance wins title100.0*Average seed
Atletico-MG 1 Bahia 1 -1.9
-0.1
Flamengo 2 Corinthians 1 No
-0.1
Vasco da Gama 0 Internacional 2 No
Gremio 1 Sao Paulo 2 -0.1
-0.2
Palmeiras 3 Fortaleza 0 -0.1
Week of 2/20100.0*Chance wins title100.0*Average seed
Sport Recife 2 Atletico-MG 3 +0.5
Sao Paulo 2 Flamengo 1 -0.2
Botafogo 1 Sao Paulo 0 +0.2
Atletico-MG 2 Palmeiras 0 +0.1
Santos 1 Fluminense 1 +0.1
Points
Chance Will Win Championship