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
Portuguesa 2 Flamengo 3 -2.8
-0.1
Parana 4 Atletico-MG 1 +2.6
+0.1
Vitoria 2 Parana 0 -2.4
-0.1
Flamengo 0 Cruzeiro 2 +1.3
Coritiba 2 Palmeiras 1 +1.2
+0.1
Ponte Preta 2 Portuguesa 1 -1.2
-0.1
Atletico-PR 2 Corinthians 2 +1.0
+0.1
Gama 1 Coritiba 1 +1.0
+0.1
Juventude 2 Vasco da Gama 1 +0.4
+0.1
Week of 10/30100.0*Chance in playoffs100.0*Average seed
Parana 1 Sao Paulo 2 +21.0
+1.6
Sao Paulo 1 Ponte Preta 0 +8.5
+1.4
Corinthians 0 Atletico-MG 4 -2.6
-0.1
Vasco da Gama 2 Atletico-PR 1 +1.5
-0.1
Palmeiras 0 Guarani 0 +1.4
+0.1
Guarani 1 Vitoria 2 +0.8
Cruzeiro 2 Botafogo-SP 1 -0.3
-0.1
Santos 2 Gremio 1 -0.2
Botafogo 3 Gama 1 +0.1
Cruzeiro 2 Vasco da Gama 1 +0.1
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Vitoria 0 Sao Paulo 3 In
+2.3
Atletico-MG 2 Gremio 0 -13.4
-0.4
Internacional 1 Palmeiras 0 +12.2
+0.3
Juventude 3 Flamengo 1 +5.4
+0.2
Corinthians 3 Coritiba 2 +4.5
+0.1
Santos 3 Cruzeiro 3 +4.5
+0.1
Corinthians 1 Ponte Preta 2 -4.4
-0.2
Flamengo 0 Santos 1 +3.6
+0.1
Coritiba 1 Juventude 1 +0.6
+0.0
Botafogo 1 Guarani 0 +0.1
Sport Recife 1 Vitoria 1 +0.1
Ponte Preta 0 Gama 0 -0.1
Points
Chance Will Make Playoffs