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
Flamengo 0 Cruzeiro 2 -18.2
-1.3
Portuguesa 2 Flamengo 3 +17.4
+1.1
Parana 4 Atletico-MG 1 +3.3
+0.2
Vitoria 2 Parana 0 -2.6
-0.1
Coritiba 2 Palmeiras 1 +2.2
-0.0
Ponte Preta 2 Portuguesa 1 -1.2
-0.1
Gama 1 Coritiba 1 +0.8
+0.1
Juventude 2 Vasco da Gama 1 +0.4
+0.1
Atletico-PR 2 Corinthians 2 +0.3
+0.0
Week of 10/30100.0*Chance in playoffs100.0*Average seed
Corinthians 0 Atletico-MG 4 -7.2
-0.3
Parana 1 Sao Paulo 2 -4.4
-0.2
Vasco da Gama 2 Atletico-PR 1 +3.5
+0.1
Palmeiras 0 Guarani 0 +3.0
+0.1
Guarani 1 Vitoria 2 -1.6
-0.1
Sao Paulo 1 Ponte Preta 0 +1.2
Cruzeiro 2 Botafogo-SP 1 -0.2
-0.0
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Flamengo 0 Santos 1 -25.6
-1.6
Juventude 3 Flamengo 1 Out
-1.6
Atletico-MG 2 Gremio 0 -12.5
-0.3
Internacional 1 Palmeiras 0 +11.5
+0.2
Vitoria 0 Sao Paulo 3 -11.0
-0.2
Corinthians 1 Ponte Preta 2 -5.8
-0.3
Coritiba 1 Juventude 1 +2.1
+0.1
Sport Recife 1 Vitoria 1 -0.5
+0.1
Atletico-PR 3 Sport Recife 1 -0.3
Corinthians 3 Coritiba 2 +0.2
Santos 3 Cruzeiro 3 -0.1
Points
Chance Will Make Playoffs