How are these numbers calculated?

Big Games

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

Week of 3/3100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Bangu 1 Portuguesa 1 -4.9
-0.4
-0.3
Flamengo 1 Botafogo 0 +1.2
Week of 3/7100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Boavista 0 Flamengo 3 +0.3
Portuguesa 2 Nova Iguacu 1 -0.1
-1.7
+0.1
Vasco da Gama 0 Fluminense 0 +0.1
Madureira 0 Cabofriense 2 -0.5
-0.1
Macae 1 Volta Redonda 1 -1.1
+0.1
Portuguesa 1 Cabofriense 2 -0.2
Week of 3/17100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Bangu 0 Madureira 3 -0.6
Flamengo 4 Portuguesa 0 +0.2
Cabofriense 1 Fluminense 1 +0.1
Points
Chance Will Make Playoffs