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
Portuguesa 2 Macae 1 -0.2
+18.6
-0.7
Fluminense 1 Nova Iguacu 3 -0.1
+0.1
Volta Redonda 3 Madureira 2 +0.1
+1.7
-0.1
Bangu 0 Boavista 0 -0.8
Resende 0 Flamengo 1 -2.5
+0.1
Week of 3/22100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Macae 1 Resende 2 Out
+14.3
-0.5
Fluminense 3 Macae 0 Yes
-0.1
Flamengo 3 Bangu 0 -2.7
+0.1
Boavista 1 Volta Redonda 0 +2.2
-0.1
Portuguesa 2 Madureira 0 +2.1
-0.1
Bangu 0 Botafogo 2 -0.7
+0.1
Nova Iguacu 0 Portuguesa 0 -0.5
+0.0
Volta Redonda 2 Nova Iguacu 1 +0.5
Resende 0 Boavista 1 +0.2
Week of 3/29100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Bangu 2 Macae 0 -0.1
Points
Chance Will Make Playoffs