How are these numbers calculated?

Big Games

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

Week of 3/18100.0*Chance in playoffs100.0*Average seed
Fluminense 1 Nova Iguacu 3 -0.6
-0.2
Vasco da Gama 0 Botafogo 0 +0.2
Volta Redonda 3 Madureira 2 +0.1
Resende 0 Flamengo 1 -0.1
Week of 3/22100.0*Chance in playoffs100.0*Average seed
Botafogo 2 Fluminense 3 In
+0.2
Nova Iguacu 0 Portuguesa 0 +0.1
Boavista 1 Volta Redonda 0 +0.1
Fluminense 3 Macae 0 +0.1
Flamengo 3 Bangu 0 -0.1
Flamengo 2 Vasco da Gama 2 +0.0
Week of 3/29100.0*Chance in playoffs100.0*Average seed
Fluminense 1 Flamengo 1 -0.4
Volta Redonda 1 Flamengo 1 +0.1
Madureira 2 Fluminense 2 -0.0
Points
Chance Will Make Playoffs