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*Average seed
Boavista 0 Fluminense 3 -0.1
+0.0
Botafogo 2 Madureira 1 -0.1
Week of 3/19100.0*Chance in playoffs100.0*Average seed
Cabofriense 1 Volta Redonda 1 Out
-0.3
Bangu 2 Americano 0 -1.8
-0.1
Resende 0 Vasco da Gama 2 +0.1
Botafogo 4 Portuguesa 1 -0.1
Week of 3/23100.0*Chance in playoffs100.0*Average seed
Madureira 0 Cabofriense 0 -0.3
Americano 2 Botafogo 2 +0.3
Points
Chance Will Make Playoffs