How are these numbers calculated?

Big Games

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

Week of 11/7100.0*Chance in playoffs100.0*Average seed
Guarani 0 Portuguesa 1 +23.7
+1.7
Goias 4 Juventude 1 -2.2
-0.1
Santos 1 Vitoria 0 +2.2
+0.1
Sport Recife 0 Corinthians 0 +1.6
+0.1
Internacional 2 Parana 1 -1.4
-0.1
Atletico-MG 5 Vasco da Gama 1 -1.3
-0.1
Corinthians 0 Bahia 0 +1.0
+0.1
Vasco da Gama 1 Santos 2 +0.9
+0.1
Coritiba 0 Flamengo 0 +0.8
+0.0
Gremio 3 Santos 0 -0.7
-0.1
Sao Paulo 2 Gremio 1 -0.2
Fluminense 2 Atletico-PR 3 -0.1
Criciuma 2 Palmeiras 1 +0.1
Botafogo 0 Cruzeiro 0 *+0.1
Week of 11/14100.0*Chance in playoffs100.0*Average seed
Portuguesa 1 Internacional 2 -19.8
-1.3
Cruzeiro 3 Sport Recife 1 +4.0
+0.2
Corinthians 1 Goias 1 +2.3
+0.1
Flamengo 3 Fluminense 1 -1.3
-0.1
Bragantino 3 Sao Paulo 4 -1.0
-0.1
Vitoria 0 Guarani 1 -0.9
-0.1
Palmeiras 2 Atletico-MG 0 +0.5
Cruzeiro 0 Coritiba 0 -0.1
Week of 11/21100.0*Chance in playoffs100.0*Average seed
Portuguesa 4 Botafogo 1 +31.8
+1.7
Gremio 1 Goias 3 -10.3
-0.3
Parana 1 Sao Paulo 1 +6.3
+0.1
Palmeiras 4 Sport Recife 1 +6.3
+0.1
Bragantino 1 Internacional 0 +6.3
+0.1
Sao Paulo 1 Cruzeiro 0 -3.7
-0.3
Atletico-MG 3 Atletico-PR 2 -1.5
-0.1
Corinthians 1 Coritiba 1 +0.1
Flamengo 0 Bahia 1 +0.1

* 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