How are these numbers calculated?

Big Games

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

Week of 3/11100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Botafogo 2 Madureira 1 +0.1
-4.8
+0.5
Boavista 0 Fluminense 3 -0.1
+0.1
Week of 3/19100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Madureira 0 Flamengo 2 -0.1
+0.0
Bangu 2 Americano 0 No
+0.0
Botafogo 4 Portuguesa 1 +0.4
Resende 0 Vasco da Gama 2 +0.2
Cabofriense 1 Volta Redonda 1 +0.0
Week of 3/23100.0*Chance in playoffs100.0*Seletiva100.0*Average seed
Americano 2 Botafogo 2 -0.4
Madureira 0 Cabofriense 0 +0.4
Volta Redonda 2 Boavista 4 -0.3
Portuguesa 2 Resende 1 +0.1
Points
Chance Will Make Playoffs