How are these numbers calculated?

Big Games

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

Week of 10/25100.0*Chance in playoffs100.0*Average seed
Atletico-MG 3 America-RN 2 In
+0.5
Guarani 0 Juventude 0 *In
Portuguesa 1 Goias 2 +0.1
Criciuma 3 Vasco da Gama 4 -0.1
Internacional 4 Flamengo 0 -0.1
Week of 11/1100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 2 Atletico-MG 0 -0.4
Parana 1 Atletico-MG 0 -0.4
Corinthians 1 Flamengo 0 +0.2
Atletico-PR 2 Internacional 1 +0.1
Portuguesa 2 Criciuma 2 +0.1
Vasco da Gama 3 Bahia 1 -0.1
Flamengo 1 Coritiba 0 -0.1
Week of 11/8100.0*Chance in playoffs100.0*Average seed
Atletico-MG 3 Vitoria 2 +0.5
Botafogo 3 Portuguesa 3 -0.1

* 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