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*Seletiva100.0*Average seed
Bangu 1 Portuguesa 1 +0.1
Week of 3/7100.0*Seletiva100.0*Average seed
Madureira 0 Cabofriense 2 -14.6
+0.9
Portuguesa 2 Nova Iguacu 1 -2.1
+0.1
Macae 1 Volta Redonda 1 -4.7
+0.2
Portuguesa 1 Cabofriense 2 +0.7
Fluminense 2 Nova Iguacu 1 +0.0
Volta Redonda 1 Botafogo 1 +0.0
Week of 3/17100.0*Seletiva100.0*Average seed
Bangu 0 Madureira 3 +0.6
Cabofriense 1 Fluminense 1 -0.2
Flamengo 4 Portuguesa 0 +0.1
Points
Chance Will Make Playoffs