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
Cruzeiro 3 Palmeiras 1 -4.8
-0.2
Vasco da Gama 3 Coritiba 1 -4.3
-0.2
Vasco da Gama 0 Vitoria 1 +2.7
+0.1
Flamengo 2 Guarani 1 -2.5
-0.1
Gremio 2 America-RN 1 -2.4
-0.1
America-MG 2 Atletico-PR 1 +2.0
+0.1
Coritiba 1 Atletico-MG 1 -1.2
-0.0
Sport Recife 2 Botafogo 1 -0.3
-0.1
Portuguesa 1 Internacional 1 +0.2
Goias 2 Juventude 2 +0.1
Week of 10/31100.0*Chance in playoffs100.0*Average seed
Atletico-MG 1 Sport Recife 0 +33.0
+1.4
Atletico-PR 1 Cruzeiro 2 -7.4
-0.2
Flamengo 2 America-MG 0 -5.7
-0.2
Guarani 1 Gremio 3 -5.7
-0.2
Internacional 0 Botafogo 0 +1.7
+0.1
Vitoria 2 Corinthians 3 +1.4
+0.1
Portuguesa 3 Bragantino 1 -0.0
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Ponte Preta 0 Atletico-MG 0 -22.9
-0.8
Gremio 4 Portuguesa 2 -11.4
-0.4
Parana 2 Flamengo 1 +9.4
+0.3
Goias 2 Vasco da Gama 2 +9.3
+0.3
Cruzeiro 5 Juventude 0 -8.3
-0.2
Palmeiras 2 Vasco da Gama 1 +3.2
+0.2
Coritiba 1 Internacional 0 +2.1
+0.1
Sport Recife 2 Guarani 1 -0.1
Points
Chance Will Make Playoffs