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
Atletico-MG 2 Palmeiras 1 -15.2
-1.0
Palmeiras 1 Vasco da Gama 3 -10.7
-1.3
Bahia 2 Gama 1 -3.0
-0.1
Ponte Preta 1 Juventude 0 -2.7
-0.1
Sao Paulo 3 Flamengo 1 -2.7
-0.1
Santos 1 Ponte Preta 2 -2.4
America-MG 1 Bahia 2 -2.3
-0.1
Flamengo 1 Internacional 0 +2.2
+0.1
Cruzeiro 1 Sao Paulo 4 -2.1
-0.1
Goias 2 Coritiba 1 -1.8
-0.1
Vitoria 1 Goias 0 +1.4
+0.1
Portuguesa 1 Cruzeiro 3 +1.2
+0.1
Internacional 3 Santos 0 -0.8
Botafogo-SP 2 Vitoria 0 +0.6
+0.1
Parana 0 Fluminense 1 -0.2
Gremio 1 Sao Caetano 2 +0.1
Fluminense 0 Portuguesa 0 +0.1
+0.0
Guarani 1 Parana 0 +0.0
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Internacional 0 Corinthians 2 +0.3
Palmeiras 2 Cruzeiro 1 +0.3
+1.4
Bahia 1 Coritiba 1 -0.3
+0.1
Ponte Preta 2 Sport Recife 1 Out
Goias 3 America-MG 0 -0.1
-0.2
Vasco da Gama 7 Sao Paulo 1 -0.2
Portuguesa 2 Botafogo 1 -0.2
Fluminense 2 Santos 1 +0.2
Santa Cruz 1 Vitoria 1 +0.1
Botafogo-SP 0 Parana 2 -0.1
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Flamengo 2 Palmeiras 0 -1.2
Cruzeiro 4 Internacional 2 +0.2
Parana 3 Goias 1 +0.2
Gremio 3 Portuguesa 1 +0.2
Vitoria 2 Atletico-PR 4 +0.1
Points
Chance Will Make Playoffs