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 -0.7
-0.1
Botafogo 2 Madureira 1 -0.1
Week of 3/19100.0*Chance in playoffs100.0*Average seed
Cabofriense 1 Volta Redonda 1 -10.2
-0.1
Bangu 2 Americano 0 -8.3
-0.1
Resende 0 Vasco da Gama 2 -2.0
-0.1
Madureira 0 Flamengo 2 -0.0
Week of 3/23100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 1 Bangu 2 -40.4
-0.4
Flamengo 3 Fluminense 2 +4.4
Volta Redonda 2 Boavista 4 Out
Points
Chance Will Make Playoffs