How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 10/24100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Vasco da Gama 3 Coritiba 1 +17.5
No
+1.6
Vasco da Gama 0 Vitoria 1 -17.3
-1.5
Cruzeiro 3 Palmeiras 1 -2.4
-0.2
Gremio 2 America-RN 1 -2.2
-0.1
Flamengo 2 Guarani 1 -1.2
-0.1
America-MG 2 Atletico-PR 1 +1.2
+0.1
Coritiba 1 Atletico-MG 1 +1.0
+0.0
Portuguesa 1 Internacional 1 +0.9
+0.0
Sport Recife 2 Botafogo 1 -0.5
Goias 2 Juventude 2 +0.1
Sao Paulo 1 Corinthians 2 *+0.1
+0.0
Bragantino 1 Juventude 0 +0.0
Week of 10/31100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Atletico-MG 1 Sport Recife 0 -6.1
-0.2
Atletico-PR 1 Cruzeiro 2 -5.3
-0.1
Guarani 1 Gremio 3 -3.9
-0.1
Flamengo 2 America-MG 0 -3.4
-0.2
Internacional 0 Botafogo 0 +2.7
+0.1
Vitoria 2 Corinthians 3 +1.3
+0.2
Week of 11/7100.0*Chance in playoffs100.0*Serie B100.0*Average seed
Palmeiras 2 Vasco da Gama 1 -26.3
-1.1
Goias 2 Vasco da Gama 2 -24.4
-0.4
Cruzeiro 5 Juventude 0 -11.4
-0.3
Ponte Preta 0 Atletico-MG 0 +5.7
+0.1
Gremio 4 Portuguesa 2 -2.5
-0.3
Parana 2 Flamengo 1 +2.3
+0.3
Coritiba 1 Internacional 0 +1.3
+0.3

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

Points
Chance Will Make Playoffs