How are these numbers calculated?

Big Games

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

Week of 11/15100.0*Chance in playoffs100.0*Average seed
Botafogo-SP 2 Vitoria 0 -3.8
-1.7
Bahia 2 Gama 1 -0.8
-0.0
Sao Paulo 3 Flamengo 1 -0.6
-0.0
Ponte Preta 1 Juventude 0 -0.6
-0.1
Atletico-MG 2 Palmeiras 1 +0.5
+0.1
Portuguesa 1 Cruzeiro 3 +0.3
+0.1
Goias 2 Coritiba 1 -0.2
Vitoria 1 Goias 0 +0.1
+1.8
Internacional 3 Santos 0 -0.1
+0.1
Parana 0 Fluminense 1 -0.1
+0.1
America-MG 1 Bahia 2 -0.1
Santos 1 Ponte Preta 2 +0.1
Cruzeiro 1 Sao Paulo 4 +0.1
Vasco da Gama 2 Gremio 0 -0.1
Palmeiras 1 Vasco da Gama 3 -0.1
Sao Caetano 2 Guarani 0 +0.1
Coritiba 1 Santa Cruz 0 -0.2
Gama 4 Atletico-PR 1 -0.1
Corinthians 2 Atletico-MG 2 +0.0
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Internacional 0 Corinthians 2 +0.1
-0.1
Ponte Preta 2 Sport Recife 1 Out
Santa Cruz 1 Vitoria 1 Out
-0.6
Palmeiras 2 Cruzeiro 1 -0.2
Vasco da Gama 7 Sao Paulo 1 -0.3
Goias 3 America-MG 0 -0.2
Fluminense 2 Santos 1 +0.2
Portuguesa 2 Botafogo 1 -0.2
Botafogo-SP 0 Parana 2 -0.1
Juventude 2 Gama 1 +0.1
Atletico-PR 2 Guarani 2 +0.0
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Vitoria 2 Atletico-PR 4 -1.4
Coritiba 1 Ponte Preta 2 +0.3
Parana 3 Goias 1 -0.3
Guarani 1 Santa Cruz 2 +0.2
Flamengo 2 Palmeiras 0 +0.2
Santos 2 Vasco da Gama 2 -0.2
Corinthians 1 Fluminense 2 +0.2
Gremio 3 Portuguesa 1 +0.1
Points
Chance Will Make Playoffs