How are these numbers calculated?

Big Games

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

Week of 3/20100.0*Chance in playoffs100.0*Average seed
Volta Redonda 0 Botafogo 1 +21.1
+0.6
Vasco da Gama 2 Americano 3 +7.1
+0.2
America 3 Boavista 2 -5.8
-0.2
Olaria 1 Vasco da Gama 0 +4.4
+0.1
Americano 2 Macae 1 +4.1
+0.1
Macae 3 Olaria 1 -3.4
-0.1
Botafogo 2 Flamengo 2 -3.1
-0.1
Flamengo 3 Tigres do Brasil 1 +2.6
+0.1
Tigres do Brasil 3 Volta Redonda 0 -1.7
-0.1
Bangu 1 America 1 +1.3
+0.0
Friburguense 2 Bangu 3 +0.2
Duque de Caxias 0 Madureira 1 -0.2
Madureira 1 Fluminense 3 +0.1
Fluminense 2 Resende 1 *+0.1
Week of 3/27100.0*Chance in playoffs100.0*Average seed
Boavista 1 Botafogo 4 In
+0.4
Vasco da Gama 3 Fluminense 0 -5.0
-0.1
Flamengo 2 America 1 +3.1
+0.2
Macae 2 Duque de Caxias 2 +1.3
+0.0
Week of 4/3None

* 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