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
Flamengo 1 Botafogo 0 +0.1
Week of 3/7100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Fluminense 2 Nova Iguacu 1 -12.3
+0.2
Macae 1 Volta Redonda 1 +5.9
-0.3
Volta Redonda 1 Botafogo 1 +4.9
-0.2
Portuguesa 2 Nova Iguacu 1 -4.4
+0.1
Madureira 0 Cabofriense 2 -2.6
+0.0
Portuguesa 1 Cabofriense 2 -0.1
Week of 3/17100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Volta Redonda 2 Boavista 3 Yes
-0.4
Nova Iguacu 0 Macae 2 -21.7
+0.2
Bangu 0 Madureira 3 +14.2
-0.3
Points
Chance Will Make Playoffs