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
Juventude 2 Vasco da Gama 1 -3.4
-1.1
Parana 4 Atletico-MG 1 +1.1
+0.1
Portuguesa 2 Flamengo 3 -0.9
Vitoria 2 Parana 0 -0.8
-0.1
Flamengo 0 Cruzeiro 2 +0.7
-0.1
Coritiba 2 Palmeiras 1 +0.6
+0.1
Ponte Preta 2 Portuguesa 1 -0.4
-0.1
Gama 1 Coritiba 1 +0.3
Atletico-PR 2 Corinthians 2 +0.0
Week of 10/30100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 2 Atletico-PR 1 +5.7
+1.1
Corinthians 0 Atletico-MG 4 -1.5
-0.1
Parana 1 Sao Paulo 2 -0.9
-0.1
Guarani 1 Vitoria 2 -0.3
-0.0
Cruzeiro 2 Vasco da Gama 1 -0.8
Palmeiras 0 Guarani 0 In
+0.1
Cruzeiro 2 Botafogo-SP 1 -0.1
Sao Paulo 1 Ponte Preta 0 -0.0
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 1 Botafogo-SP 1 -0.7
Sport Recife 1 Vitoria 1 +0.3
Botafogo 1 Guarani 0 +0.2
Vitoria 0 Sao Paulo 3 +0.2
Corinthians 1 Ponte Preta 2 -0.2
Ponte Preta 0 Gama 0 +0.2
Flamengo 0 Santos 1 +0.0
Cruzeiro 5 Parana 2 -0.0
Points
Chance Will Make Playoffs