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
Goias 2 Coritiba 1 +16.1
+2.0
Vitoria 1 Goias 0 -16.0
-1.4
America-MG 1 Bahia 2 -4.1
-0.2
Santos 1 Ponte Preta 2 -3.3
-0.0
Flamengo 1 Internacional 2 -2.6
-0.1
Cruzeiro 1 Sao Paulo 4 -2.6
-0.1
Bahia 2 Gama 1 -1.8
-0.1
Ponte Preta 1 Juventude 0 -1.7
-0.1
Sao Paulo 3 Flamengo 1 -1.7
-0.1
Atletico-MG 2 Palmeiras 1 +1.3
+0.1
Parana 0 Fluminense 1 -1.2
+0.0
Palmeiras 1 Vasco da Gama 3 +1.0
+0.1
Portuguesa 1 Cruzeiro 3 +0.8
+0.1
Internacional 3 Santos 0 -0.4
+0.0
Fluminense 0 Portuguesa 0 +0.3
+0.1
Botafogo-SP 2 Vitoria 0 +0.2
+0.1
Vasco da Gama 2 Gremio 0 -0.2
-0.1
Sao Caetano 2 Guarani 0 +0.1
Coritiba 1 Santa Cruz 0 -0.1
Guarani 1 Parana 0 +0.0
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Goias 3 America-MG 0 +2.9
+1.4
Ponte Preta 2 Sport Recife 1 Out
Fluminense 2 Santos 1 -0.9
+0.2
Bahia 1 Coritiba 1 +0.3
+0.1
Vasco da Gama 7 Sao Paulo 1 -0.2
Palmeiras 2 Cruzeiro 1 -0.2
Portuguesa 2 Botafogo 1 -0.2
Santa Cruz 1 Vitoria 1 +0.1
Botafogo-SP 0 Parana 2 -0.1
Atletico-PR 2 Guarani 2 +0.0
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Parana 3 Goias 1 -0.7
Flamengo 2 Palmeiras 0 +0.2
Santos 2 Vasco da Gama 2 +0.2
Gremio 3 Portuguesa 1 +0.2
Sport Recife 0 Bahia 1 -0.1
Points
Chance Will Make Playoffs