How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Chance in playoffs100.0*Average seed
Portuguesa 1 Cruzeiro 3 -11.6
-1.6
Fluminense 0 Portuguesa 0 -3.0
-0.5
Bahia 2 Gama 1 -1.6
-0.1
Sao Paulo 3 Flamengo 1 -1.6
-0.1
Ponte Preta 1 Juventude 0 -1.6
-0.1
Parana 0 Fluminense 1 -1.3
+0.0
Atletico-MG 2 Palmeiras 1 +1.2
+0.1
Goias 2 Coritiba 1 -0.9
-0.1
America-MG 1 Bahia 2 -0.8
-0.1
Santos 1 Ponte Preta 2 -0.6
+0.1
Cruzeiro 1 Sao Paulo 4 -0.5
+0.1
Vitoria 1 Goias 0 +0.4
-0.1
Internacional 3 Santos 0 -0.4
+0.0
Flamengo 1 Internacional 0 +0.4
Botafogo-SP 2 Vitoria 0 +0.4
+0.1
Palmeiras 1 Vasco da Gama 3 +0.2
-0.1
Vasco da Gama 2 Gremio 0 -0.1
-0.1
Sao Caetano 2 Guarani 0 +0.1
Coritiba 1 Santa Cruz 0 -0.2
Corinthians 2 Atletico-MG 2 +0.0
Guarani 1 Parana 0 +0.0
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Portuguesa 2 Botafogo 1 +1.9
Fluminense 2 Santos 1 +0.2
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Gremio 3 Portuguesa 1 -1.5
Vitoria 2 Atletico-PR 4 +0.2
Cruzeiro 4 Internacional 2 +0.2
Parana 3 Goias 1 +0.2
Santos 2 Vasco da Gama 2 +0.2
Coritiba 1 Ponte Preta 2 +0.1
Flamengo 2 Palmeiras 0 +0.1
Points
Chance Will Make Playoffs