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-MG 2 Atletico-PR 1 -8.9
-1.7
Vasco da Gama 0 Vitoria 1 +1.1
-0.1
Cruzeiro 3 Palmeiras 1 -1.1
-0.2
Gremio 2 America-RN 1 -0.9
-0.1
Flamengo 2 Guarani 1 -0.8
-0.1
Portuguesa 1 Internacional 1 +0.3
Vasco da Gama 3 Coritiba 1 -0.3
-0.2
Coritiba 1 Atletico-MG 1 +0.2
Sport Recife 2 Botafogo 1 -0.2
+0.1
Goias 2 Juventude 2 +0.1
+0.1
Sao Paulo 1 Corinthians 2 +0.1
Bragantino 1 Juventude 0 +0.1
Week of 10/31100.0*Chance in playoffs100.0*Average seed
Atletico-PR 1 Cruzeiro 2 Out
-1.1
Atletico-MG 1 Sport Recife 0 -0.6
Guarani 1 Gremio 3 -0.4
+0.0
Flamengo 2 America-MG 0 -0.3
-0.1
Internacional 0 Botafogo 0 +0.2
+0.1
Vitoria 2 Corinthians 3 +0.1
+0.1
America-RN 0 Ponte Preta 1 -0.1
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Sao Paulo 2 Atletico-PR 0 -1.2
Botafogo 2 Santos 1 -0.5
Ponte Preta 0 Atletico-MG 0 +0.2
Cruzeiro 5 Juventude 0 +0.2
Bragantino 0 Vitoria 0 -0.1
Sport Recife 2 Guarani 1 +0.1
Points
Chance Will Make Playoffs