How are these numbers calculated?

Big Games

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

Week of 4/2100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 4 Bangu 0 +20.1
+0.6
Macae 2 Boavista 1 +8.9
+0.3
Duque de Caxias 0 Flamengo 2 -5.8
-0.2
Volta Redonda 1 Fluminense 2 +1.3
+0.1
Americano 0 Olaria 0 +1.1
+0.0
Botafogo 1 Resende 1 +0.5
+0.0
Week of 4/9100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 2 Cabofriense 1 +12.1
+0.3
Botafogo 0 Flamengo 2 -4.9
-0.2
Madureira 2 Boavista 1 +4.7
+0.1
Americano 1 Fluminense 5 In
+0.1
Week of 4/17100.0*Chance in playoffs100.0*Average seed
Flamengo 1 Macae 1 +0.4
Olaria 2 Vasco da Gama 2 -0.2
Points
Chance Will Make Playoffs