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
Santos 1 Vitoria 0 -15.9
-1.5
Guarani 0 Portuguesa 1 -2.1
-0.1
Sport Recife 0 Corinthians 0 +1.5
+0.1
Goias 4 Juventude 1 -1.3
-0.1
Atletico-MG 5 Vasco da Gama 1 -1.1
Coritiba 0 Flamengo 0 +1.0
+0.1
Internacional 2 Parana 1 -1.0
-0.1
Corinthians 0 Bahia 0 +0.8
+0.1
Vasco da Gama 1 Santos 2 +0.7
+0.1
Criciuma 2 Palmeiras 1 +0.2
Sao Paulo 2 Gremio 1 -0.2
-0.1
Gremio 3 Santos 0 -0.1
+0.0
Botafogo 0 Cruzeiro 0 +0.0
Week of 11/14100.0*Chance in playoffs100.0*Average seed
Vitoria 0 Guarani 1 -8.4
-1.2
Corinthians 1 Goias 1 +1.3
+0.1
Cruzeiro 3 Sport Recife 1 +1.0
+0.1
Portuguesa 1 Internacional 2 -0.3
-0.2
Flamengo 3 Fluminense 1 -0.3
-0.2
Bragantino 3 Sao Paulo 4 -0.2
-0.2
Santos 3 Atletico-PR 2 -0.1
Vasco da Gama 4 Criciuma 2 -0.1
Juventude 3 Botafogo 5 -0.0
Week of 11/21100.0*Chance in playoffs100.0*Average seed
Vitoria 1 Fluminense 3 -1.4
Flamengo 0 Bahia 1 +0.2
Corinthians 1 Coritiba 1 +0.2
Sao Paulo 1 Cruzeiro 0 -0.2
Parana 1 Sao Paulo 1 +0.2
Portuguesa 4 Botafogo 1 +0.2
Vasco da Gama 0 Guarani 2 +0.1
Cruzeiro 2 Santos 1 +0.1
Points
Chance Will Make Playoffs