How are these numbers calculated?

Big Games

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

Week of 10/25100.0*Chance in playoffs100.0*Average seed
Flamengo 1 Vitoria 0 +2.2
+0.6
Internacional 4 Flamengo 0 -1.3
-0.4
Guarani 0 Juventude 0 +0.8
+0.1
Palmeiras 5 Gremio 1 -0.6
-0.1
Vitoria 1 Cruzeiro 1 +0.6
+0.0
Atletico-MG 3 America-RN 2 +0.5
Santos 3 Bahia 1 -0.3
-0.1
Botafogo 0 Parana 0 +0.1
Portuguesa 1 Goias 2 +0.1
Week of 11/1100.0*Chance in playoffs100.0*Average seed
Flamengo 1 Coritiba 0 In
+0.4
Vitoria 2 Santos 0 +0.2
Palmeiras 3 Goias 3 +0.1
Corinthians 1 Flamengo 0 -0.8
Vasco da Gama 2 Atletico-MG 0 +0.2
Portuguesa 2 Criciuma 2 +0.1
Parana 1 Atletico-MG 0 +0.1
Week of 11/8100.0*Chance in playoffs100.0*Average seed
Flamengo 0 Uniao Sao Joao 0 +0.2
Botafogo 3 Portuguesa 3 -0.2
Atletico-MG 3 Vitoria 2 -0.1
Santos 2 Cruzeiro 2 +0.1
Sport Recife 1 Palmeiras 1 +0.1
Points
Chance Will Make Playoffs