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*Seletiva100.0*Average seed
Volta Redonda 3 Madureira 2 +7.9
-6.6
+1.1
Fluminense 1 Nova Iguacu 3 -1.5
-0.1
Vasco da Gama 0 Botafogo 0 +1.1
Resende 0 Flamengo 1 +0.1
-0.3
+0.1
Bangu 0 Boavista 0 +0.1
-0.3
+0.1
Portuguesa 2 Macae 1 +0.7
-0.0
Week of 3/22100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Boavista 1 Volta Redonda 0 -9.6
+2.1
-1.1
Volta Redonda 2 Nova Iguacu 1 +6.5
-3.1
+1.3
Bangu 0 Botafogo 2 -3.7
-0.1
Nova Iguacu 0 Portuguesa 0 +1.3
+0.1
Flamengo 2 Vasco da Gama 2 -1.1
-0.0
Portuguesa 2 Madureira 0 +0.9
+2.6
-0.0
Resende 0 Boavista 1 +0.8
-0.0
Botafogo 2 Fluminense 3 +0.5
+0.0
Vasco da Gama 1 Madureira 0 -0.4
-0.0
Macae 1 Resende 2 -0.1
+0.2
-0.1
Flamengo 3 Bangu 0 +0.1
-0.1
+0.0
Week of 3/29100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Portuguesa 1 Botafogo 4 Out
-0.1
Resende 0 Nova Iguacu 1 -3.0
No
-0.2
Vasco da Gama 1 Boavista 0 -1.5
+0.0
Volta Redonda 1 Flamengo 1 +0.5
No
+0.2
Madureira 2 Fluminense 2 -0.1
Macae 2 Volta Redonda 2 -0.7
Nova Iguacu 0 Vasco da Gama 2 +0.2
Madureira 3 Bangu 1 -0.2
Boavista 1 Portuguesa 1 +0.2
Points
Chance Will Make Playoffs