How are these numbers calculated?

Big Games

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

Week of 10/23100.0*Chance in playoffs100.0*Average seed
Ponte Preta 2 Portuguesa 1 Out
-0.6
Vitoria 2 Parana 0 +0.1
Portuguesa 2 Flamengo 3 -0.8
Parana 4 Atletico-MG 1 -0.2
Juventude 2 Vasco da Gama 1 -0.1
Botafogo-SP 2 Internacional 1 +0.0
Gama 1 Coritiba 1 +0.0
Gremio 2 Sport Recife 1 -0.0
Week of 10/30100.0*Chance in playoffs100.0*Average seed
Botafogo 3 Gama 1 -0.2
Cruzeiro 2 Botafogo-SP 1 +0.1
Parana 1 Sao Paulo 2 +0.1
Parana 1 Internacional 0 +0.0
Sport Recife 0 Juventude 1 -0.0
Gremio 0 Corinthians 3 +0.0
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Gama 2 Portuguesa 1 -0.8
Portuguesa 2 Parana 2 -0.4
Atletico-PR 3 Sport Recife 1 +0.3
Juventude 3 Flamengo 1 -0.2
Vasco da Gama 1 Botafogo-SP 1 -0.2
Sport Recife 1 Vitoria 1 +0.0
Cruzeiro 5 Parana 2 +0.0
Points
Chance Will Make Playoffs