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 +20.3
-0.5
Portuguesa 2 Nova Iguacu 1 +16.7
-0.8
Madureira 0 Cabofriense 2 -2.8
-0.0
Macae 1 Volta Redonda 1 -1.6
+0.1
Volta Redonda 1 Botafogo 1 -0.7
+0.0
Portuguesa 1 Cabofriense 2 -0.1
Week of 3/17100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Nova Iguacu 0 Macae 2 Yes
-0.9
Bangu 0 Madureira 3 +5.7
-0.4
Points
Chance Will Make Playoffs