How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 3/18100.0*Chance in playoffs100.0*Average seed
Volta Redonda 3 Madureira 2 -16.2
-0.6
Fluminense 1 Nova Iguacu 3 -7.1
-0.2
Vasco da Gama 0 Botafogo 0 +5.9
+0.1
Resende 0 Flamengo 1 +0.3
+0.0
Bangu 0 Boavista 0 +0.2
Week of 3/22100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 1 Madureira 0 -11.7
-0.8
Portuguesa 2 Madureira 0 -6.1
-1.2
Nova Iguacu 0 Portuguesa 0 +3.9
+0.1
Volta Redonda 2 Nova Iguacu 1 +2.7
-0.0
Boavista 1 Volta Redonda 0 +0.7
+0.1
Botafogo 2 Fluminense 3 +0.7
+0.1
Macae 1 Resende 2 -0.1
-0.1
Flamengo 3 Bangu 0 +0.0
Week of 3/29100.0*Chance in playoffs100.0*Average seed
Madureira 2 Fluminense 2 Out
+0.4
Resende 0 Nova Iguacu 1 -0.2
-0.0
Volta Redonda 1 Flamengo 1 -0.0
Madureira 3 Bangu 1 +0.7
Macae 2 Volta Redonda 2 +0.3
Vasco da Gama 1 Boavista 0 +0.2
Bangu 2 Macae 0 -0.1
Boavista 1 Portuguesa 1 +0.1
Portuguesa 1 Botafogo 4 +0.0
Points
Chance Will Make Playoffs