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*Serie B100.0*Average seed
Botafogo 0 Cruzeiro 0 -0.3
-0.1
Guarani 0 Portuguesa 1 -0.1
Goias 4 Juventude 1 +0.0
Coritiba 0 Flamengo 0 +0.1
Internacional 2 Parana 1 +0.0
Santos 1 Vitoria 0 -0.1
Atletico-MG 5 Vasco da Gama 1 +0.1
Vasco da Gama 1 Santos 2 -0.1
Sao Paulo 2 Gremio 1 -0.2
Gremio 3 Santos 0 +0.1
Week of 11/14100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Juventude 3 Botafogo 5 No
+1.5
Flamengo 3 Fluminense 1 -0.1
Bragantino 3 Sao Paulo 4 -0.1
Vitoria 0 Guarani 1 +0.1
Santos 3 Atletico-PR 2 -0.3
Vasco da Gama 4 Criciuma 2 -0.2
Gremio 0 Coritiba 2 -0.2
Parana 2 Bahia 1 -0.1
Week of 11/21100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Portuguesa 4 Botafogo 1 -1.2
Vasco da Gama 0 Guarani 2 +0.3
Flamengo 0 Bahia 1 +0.2
Cruzeiro 2 Santos 1 +0.2
Vitoria 1 Fluminense 3 +0.2
Parana 1 Sao Paulo 1 -0.1
Corinthians 1 Coritiba 1 -0.1
Points
Chance Will Make Playoffs