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
Coritiba 2 Palmeiras 1 -20.8
-1.4
Parana 4 Atletico-MG 1 +3.4
+0.2
Portuguesa 2 Flamengo 3 -2.5
-0.1
Vitoria 2 Parana 0 -2.3
-0.1
Flamengo 0 Cruzeiro 2 +1.7
+0.0
Ponte Preta 2 Portuguesa 1 -1.1
-0.1
Gama 1 Coritiba 1 +0.7
+0.1
Juventude 2 Vasco da Gama 1 +0.5
+0.1
Week of 10/30100.0*Chance in playoffs100.0*Average seed
Palmeiras 0 Guarani 0 -8.4
-0.5
Corinthians 0 Atletico-MG 4 -4.1
-0.3
Parana 1 Sao Paulo 2 -3.0
-0.1
Vasco da Gama 2 Atletico-PR 1 +1.5
+0.1
Sao Paulo 1 Ponte Preta 0 -0.6
Guarani 1 Vitoria 2 -0.3
Cruzeiro 2 Botafogo-SP 1 -0.2
Santos 2 Gremio 1 -0.1
-0.0
Botafogo 3 Gama 1 +0.0
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Internacional 1 Palmeiras 0 -54.2
-1.9
Atletico-MG 2 Gremio 0 -6.5
-0.2
Juventude 3 Flamengo 1 +6.0
+0.3
Vitoria 0 Sao Paulo 3 -4.5
-0.4
Santos 3 Cruzeiro 3 +2.7
+0.1
Flamengo 0 Santos 1 +2.6
+0.1
Corinthians 1 Ponte Preta 2 -2.1
-0.2
Atletico-PR 3 Sport Recife 1 -1.1
-0.1
Coritiba 1 Juventude 1 +1.0
+0.1
Corinthians 3 Coritiba 2 +0.5
+0.1
Sport Recife 1 Vitoria 1 -0.3
-0.0
Botafogo 1 Guarani 0 +0.3
Points
Chance Will Make Playoffs