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
Botafogo 0 Cruzeiro 0 +0.0
-0.3
Guarani 0 Portuguesa 1 +0.0
Gremio 3 Santos 0 -0.1
Criciuma 2 Palmeiras 1 +0.2
Sao Paulo 2 Gremio 1 +0.1
Fluminense 2 Atletico-PR 3 -0.1
Week of 11/14100.0*Chance in playoffs100.0*Average seed
Cruzeiro 0 Coritiba 0 +0.0
-0.5
Cruzeiro 3 Sport Recife 1 In
+0.7
Vitoria 0 Guarani 1 -0.1
Palmeiras 2 Atletico-MG 0 -0.1
Portuguesa 1 Internacional 2 +0.1
Gremio 0 Coritiba 2 +0.2
Santos 3 Atletico-PR 2 +0.2
Week of 11/21100.0*Chance in playoffs100.0*Average seed
Cruzeiro 2 Santos 1 +1.1
Sao Paulo 1 Cruzeiro 0 -0.5
Atletico-PR 1 Criciuma 2 +0.3
Palmeiras 4 Sport Recife 1 -0.3
Juventude 1 Atletico-MG 0 +0.2
Vasco da Gama 0 Guarani 2 -0.2
Atletico-MG 3 Atletico-PR 2 +0.1
Gremio 1 Goias 3 +0.1
Points
Chance Will Make Playoffs