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 -18.5
-1.5
Palmeiras 1 Vasco da Gama 3 -10.8
-1.4
Sao Paulo 3 Flamengo 1 -2.8
-0.2
Bahia 2 Gama 1 -2.8
-0.2
America-MG 1 Bahia 2 -2.7
-0.1
Ponte Preta 1 Juventude 0 -2.7
-0.2
Santos 1 Ponte Preta 2 -2.0
+0.0
Cruzeiro 1 Sao Paulo 4 -1.9
Goias 2 Coritiba 1 -1.8
-0.1
Parana 0 Fluminense 1 -1.8
-0.1
Flamengo 1 Internacional 0 +1.7
+0.1
Vitoria 1 Goias 0 +1.4
+0.0
Portuguesa 1 Cruzeiro 3 +1.4
+0.1
Botafogo-SP 2 Vitoria 0 +0.7
+0.1
Internacional 3 Santos 0 -0.6
Fluminense 0 Portuguesa 0 +0.1
Coritiba 1 Santa Cruz 0 -0.1
Guarani 1 Parana 0 +0.0
Corinthians 2 Atletico-MG 2 +0.0
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Bahia 1 Coritiba 1 Out
+0.1
Portuguesa 2 Botafogo 1 -0.2
Fluminense 2 Santos 1 +0.2
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Flamengo 2 Palmeiras 0 -1.1
Gremio 3 Portuguesa 1 +0.2
Parana 3 Goias 1 +0.2
Vitoria 2 Atletico-PR 4 +0.1
Cruzeiro 4 Internacional 2 +0.1
Santos 2 Vasco da Gama 2 -0.1
Points
Chance Will Make Playoffs