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
Goias 4 Juventude 1 +11.7
+1.5
Corinthians 0 Bahia 0 +2.2
+0.1
Guarani 0 Portuguesa 1 -1.8
-0.1
Sport Recife 0 Corinthians 0 +1.5
+0.1
Santos 1 Vitoria 0 +1.4
+0.1
Atletico-MG 5 Vasco da Gama 1 -0.8
+0.0
Coritiba 0 Flamengo 0 +0.7
+0.1
Internacional 2 Parana 1 -0.6
-0.1
Vasco da Gama 1 Santos 2 +0.5
+0.1
Gremio 3 Santos 0 -0.4
Sao Paulo 2 Gremio 1 -0.1
-0.2
Botafogo 0 Cruzeiro 0 +0.0
Week of 11/14100.0*Chance in playoffs100.0*Average seed
Corinthians 1 Goias 1 -8.1
-0.2
Cruzeiro 3 Sport Recife 1 +2.5
+0.1
Bragantino 3 Sao Paulo 4 -0.9
-0.1
Flamengo 3 Fluminense 1 -0.8
-0.1
Vitoria 0 Guarani 1 -0.6
+0.1
Portuguesa 1 Internacional 2 -0.3
-0.1
Palmeiras 2 Atletico-MG 0 +0.1
Week of 11/21100.0*Chance in playoffs100.0*Average seed
Gremio 1 Goias 3 +50.5
+1.3
Bragantino 1 Internacional 0 +13.3
+0.4
Palmeiras 4 Sport Recife 1 +10.4
+0.2
Portuguesa 4 Botafogo 1 -4.1
-0.4
Parana 1 Sao Paulo 1 +3.1
-0.0
Sao Paulo 1 Cruzeiro 0 -2.2
-0.2
Atletico-MG 3 Atletico-PR 2 -1.5
-0.1
Points
Chance Will Make Playoffs