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
Internacional 3 Santos 0 +22.1
+1.5
Flamengo 1 Internacional 2 +15.2
+1.1
America-MG 1 Bahia 2 -3.4
-0.2
Bahia 2 Gama 1 -2.9
-0.2
Sao Paulo 3 Flamengo 1 -2.6
-0.2
Santos 1 Ponte Preta 2 -2.5
-0.1
Ponte Preta 1 Juventude 0 -2.5
-0.1
Vitoria 1 Goias 0 +2.3
+0.1
Atletico-MG 2 Palmeiras 1 +2.2
+0.1
Cruzeiro 1 Sao Paulo 4 -2.2
-0.2
Parana 0 Fluminense 1 -1.7
-0.1
Goias 2 Coritiba 1 -1.7
-0.1
Portuguesa 1 Cruzeiro 3 +1.5
+0.1
Palmeiras 1 Vasco da Gama 3 +1.4
+0.1
Botafogo-SP 2 Vitoria 0 +0.6
+0.0
Fluminense 0 Portuguesa 0 +0.3
+0.1
Sao Caetano 2 Guarani 0 *+0.1
Gremio 1 Sao Caetano 2 +0.1
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Internacional 0 Corinthians 2 -5.0
-1.0
Ponte Preta 2 Sport Recife 1 -3.2
-0.2
Fluminense 2 Santos 1 -2.4
-0.2
Bahia 1 Coritiba 1 +1.6
+0.1
Vasco da Gama 7 Sao Paulo 1 +1.5
+0.2
Atletico-MG 2 Gremio 0 +0.2
+0.1
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Sport Recife 0 Bahia 1 -17.6
-0.4
Cruzeiro 4 Internacional 2 -12.8
-1.3
Sao Paulo 3 Atletico-MG 0 -8.4
-0.3
Coritiba 1 Ponte Preta 2 -1.1
-0.3
Gremio 3 Portuguesa 1 -0.4
-0.3
Corinthians 1 Fluminense 2 -0.2

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

Points
Chance Will Make Playoffs