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*Average seed
Bangu 1 Portuguesa 1 -10.9
-0.3
Flamengo 1 Botafogo 0 +0.8
+0.0
Week of 3/7100.0*Chance in playoffs100.0*Average seed
Portuguesa 1 Cabofriense 2 -36.4
-1.1
Portuguesa 2 Nova Iguacu 1 +13.0
+0.4
Volta Redonda 1 Botafogo 1 +7.6
+0.1
Boavista 0 Flamengo 3 +6.2
+0.1
Vasco da Gama 0 Fluminense 0 +0.8
+0.0
Fluminense 2 Nova Iguacu 1 -0.6
-0.1
Week of 3/17100.0*Chance in playoffs100.0*Average seed
Flamengo 4 Portuguesa 0 Out
-0.7
Volta Redonda 2 Boavista 3 -0.3
Bangu 0 Madureira 3 +0.2
Cabofriense 1 Fluminense 1 +0.1
Points
Chance Will Make Playoffs