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 +2.9
+0.3
Week of 3/19100.0*Chance in playoffs100.0*Average seed
Cabofriense 1 Volta Redonda 1 +2.9
+0.1
Resende 0 Vasco da Gama 2 -1.0
-0.2
Bangu 2 Americano 0 -0.7
-0.1
Madureira 0 Flamengo 2 -0.1
Week of 3/23100.0*Chance in playoffs100.0*Average seed
Flamengo 3 Fluminense 2 -4.4
-1.2
Volta Redonda 2 Boavista 4 In
Vasco da Gama 1 Bangu 2 -2.0
-0.3
Points
Chance Will Make Playoffs