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
Parana 4 Atletico-MG 1 +3.9
+0.2
Portuguesa 2 Flamengo 3 -3.1
-0.2
Vitoria 2 Parana 0 -2.7
-0.1
Coritiba 2 Palmeiras 1 +2.5
+0.1
Flamengo 0 Cruzeiro 2 +1.7
+0.0
Ponte Preta 2 Portuguesa 1 -1.3
-0.1
Gama 1 Coritiba 1 +1.0
+0.1
Atletico-PR 2 Corinthians 2 -0.9
-0.1
Juventude 2 Vasco da Gama 1 +0.4
+0.1
Week of 10/30100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 2 Atletico-PR 1 -18.6
-1.1
Corinthians 0 Atletico-MG 4 -4.2
-0.2
Parana 1 Sao Paulo 2 -3.3
-0.2
Palmeiras 0 Guarani 0 +2.7
+0.1
Guarani 1 Vitoria 2 -1.6
-0.1
Sao Paulo 1 Ponte Preta 0 +0.9
Santos 2 Gremio 1 -0.2
Cruzeiro 2 Botafogo-SP 1 -0.1
-0.0
Botafogo 3 Gama 1 +0.1
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Internacional 1 Palmeiras 0 +3.9
+0.4
Atletico-MG 2 Gremio 0 Out
-0.2
Atletico-PR 3 Sport Recife 1 +1.4
+1.1
Juventude 3 Flamengo 1 +1.4
+0.2
Corinthians 1 Ponte Preta 2 -0.9
-0.1
Flamengo 0 Santos 1 +0.7
-0.2
Santos 3 Cruzeiro 3 +0.5
+0.0
Corinthians 3 Coritiba 2 +0.5
+0.2
Coritiba 1 Juventude 1 +0.2
+0.1
Cruzeiro 5 Parana 2 +0.0
Ponte Preta 0 Gama 0 +0.0
Points
Chance Will Make Playoffs