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 +0.2
+0.1
+0.0
Week of 3/7100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Fluminense 2 Nova Iguacu 1 -4.0
+0.2
Portuguesa 2 Nova Iguacu 1 -3.8
+0.1
Macae 1 Volta Redonda 1 +2.5
-0.2
Madureira 0 Cabofriense 2 -2.4
+0.0
Volta Redonda 1 Botafogo 1 -2.3
+0.1
Portuguesa 1 Cabofriense 2 -0.1
Week of 3/17100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Nova Iguacu 0 Macae 2 No
+0.5
Points
Chance Will Make Playoffs