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
Sport Recife 2 Botafogo 1 +4.7
+1.0
Gremio 2 America-RN 1 -1.2
-0.1
Cruzeiro 3 Palmeiras 1 -0.9
Flamengo 2 Guarani 1 -0.6
Vasco da Gama 0 Vitoria 1 +0.6
+0.1
America-MG 2 Atletico-PR 1 +0.4
Portuguesa 1 Internacional 1 +0.4
+0.1
Vasco da Gama 3 Coritiba 1 +0.1
Sao Paulo 1 Corinthians 2 -0.1
Santos 1 Parana 2 +0.1
Week of 10/31100.0*Chance in playoffs100.0*Average seed
Internacional 0 Botafogo 0 In
Atletico-MG 1 Sport Recife 0 -0.9
Santos 3 Goias 1 -0.2
Portuguesa 3 Bragantino 1 -0.2
Palmeiras 3 Parana 2 -0.2
Vitoria 2 Corinthians 3 -0.1
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Sport Recife 2 Guarani 1 +0.8
Coritiba 1 Internacional 0 -0.2
Gremio 4 Portuguesa 2 +0.2
Ponte Preta 0 Atletico-MG 0 +0.1
Palmeiras 2 Vasco da Gama 1 +0.1
Points
Chance Will Make Playoffs