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 -22.9
-1.5
Portuguesa 2 Flamengo 3 -2.6
-0.2
Vitoria 2 Parana 0 -2.3
-0.1
Coritiba 2 Palmeiras 1 +2.2
+0.1
Flamengo 0 Cruzeiro 2 +1.6
+0.0
Ponte Preta 2 Portuguesa 1 -1.1
-0.1
Gama 1 Coritiba 1 +0.7
+0.1
Juventude 2 Vasco da Gama 1 +0.4
+0.1
Week of 10/30100.0*Chance in playoffs100.0*Average seed
Corinthians 0 Atletico-MG 4 +31.7
+2.0
Parana 1 Sao Paulo 2 -2.1
-0.1
Vasco da Gama 2 Atletico-PR 1 +1.4
+0.1
Palmeiras 0 Guarani 0 +1.3
+0.1
Guarani 1 Vitoria 2 -0.4
Sao Paulo 1 Ponte Preta 0 -0.3
-0.0
Santos 2 Gremio 1 -0.1
-0.0
Cruzeiro 2 Botafogo-SP 1 -0.1
Botafogo 3 Gama 1 +0.1
Week of 11/7100.0*Chance in playoffs100.0*Average seed
Atletico-MG 2 Gremio 0 +43.7
+1.4
Vitoria 0 Sao Paulo 3 -12.3
-0.3
Internacional 1 Palmeiras 0 +10.3
+0.4
Corinthians 1 Ponte Preta 2 -4.5
-0.2
Flamengo 0 Santos 1 +4.1
+0.2
Botafogo 1 Guarani 0 +3.8
+0.2
Coritiba 1 Juventude 1 +1.9
+0.2
Juventude 3 Flamengo 1 +1.5
+0.3
Sport Recife 1 Vitoria 1 -1.0
-0.0
Santos 3 Cruzeiro 3 +0.6
+0.1
Corinthians 3 Coritiba 2 +0.5
+0.1
Atletico-PR 3 Sport Recife 1 -0.3
-0.2
Points
Chance Will Make Playoffs