How are these numbers calculated?

Big Games

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

Week of 10/24100.0*Chance in playoffs100.0*Average seed
America-RN 2 Santos 2 In
-0.6
Santos 1 Parana 2 -0.9
Cruzeiro 3 Palmeiras 1 +0.2
Coritiba 1 Atletico-MG 1 +0.1
Portuguesa 1 Internacional 1 +0.1
Vasco da Gama 3 Coritiba 1 +0.3
Sao Paulo 1 Corinthians 2 -0.1
Week of 10/31100.0*Chance in playoffs100.0*Average seed
Santos 3 Goias 1 +0.6
Atletico-MG 1 Sport Recife 0 +0.2
Portuguesa 3 Bragantino 1 -0.1
Vitoria 2 Corinthians 3 -0.1
Palmeiras 3 Parana 2 -0.1
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Botafogo 2 Santos 1 -0.7
Gremio 4 Portuguesa 2 +0.2
Coritiba 1 Internacional 0 -0.1
Palmeiras 2 Vasco da Gama 1 -0.1
Corinthians 2 America-RN 1 -0.1
Points
Chance Will Make Playoffs