How are these numbers calculated?

Big Games

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

Week of 10/23100.0*Chance in playoffs100.0*Average seed
Ponte Preta 2 Portuguesa 1 +13.5
+1.5
Vitoria 2 Parana 0 -1.7
-0.1
Portuguesa 2 Flamengo 3 -1.0
-0.1
Parana 4 Atletico-MG 1 +0.9
+0.1
Gama 1 Coritiba 1 +0.8
+0.1
Flamengo 0 Cruzeiro 2 +0.8
-0.0
Atletico-PR 2 Corinthians 2 +0.5
+0.0
Coritiba 2 Palmeiras 1 +0.5
+0.1
Juventude 2 Vasco da Gama 1 +0.3
+0.1
Gremio 2 Sport Recife 1 -0.1
Week of 10/30100.0*Chance in playoffs100.0*Average seed
Sao Paulo 1 Ponte Preta 0 -13.5
-1.4
Palmeiras 0 Guarani 0 +1.8
+0.1
Corinthians 0 Atletico-MG 4 -1.2
Vasco da Gama 2 Atletico-PR 1 +1.0
-0.1
Parana 1 Sao Paulo 2 -0.5
-0.1
Guarani 1 Vitoria 2 -0.2
-0.0
Santos 2 Gremio 1 -0.2
Cruzeiro 2 Botafogo-SP 1 -0.1
-0.2
Cruzeiro 2 Vasco da Gama 1 +0.0
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Corinthians 1 Ponte Preta 2 In
+1.7
Coritiba 1 Juventude 1 +1.2
+0.0
Flamengo 0 Santos 1 +1.1
+0.1
Botafogo 1 Guarani 0 +0.3
Vasco da Gama 1 Botafogo-SP 1 +0.1
Vitoria 0 Sao Paulo 3 +0.1
Sport Recife 1 Vitoria 1 +0.1
Ponte Preta 0 Gama 0 +0.0
Points
Chance Will Make Playoffs