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 +0.1
+0.0
Week of 3/7100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Madureira 0 Cabofriense 2 +0.4
-16.4
+1.1
Boavista 0 Flamengo 3 +0.2
Portuguesa 2 Nova Iguacu 1 -0.1
-2.6
+0.1
Macae 1 Volta Redonda 1 -2.6
+0.2
Portuguesa 1 Cabofriense 2 +0.8
Fluminense 2 Nova Iguacu 1 +0.1
Volta Redonda 1 Botafogo 1 +0.1
Week of 3/17100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Cabofriense 1 Fluminense 1 -0.4
Bangu 0 Madureira 3 +0.3
Flamengo 4 Portuguesa 0 +0.2
Points
Chance Will Make Playoffs