How are these numbers calculated?

Big Games

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

Week of 3/31100.0*Chance in playoffs100.0*Average seed
Flamengo 2 Bangu 1 +20.9
+0.5
Macae 1 Vasco da Gama 4 +11.7
+0.2
Resende 2 Americano 1 -2.3
-0.1
Fluminense 1 Botafogo 1 +0.9
+0.1
Friburguense 1 Madureira 1 +0.1
Week of 4/7100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 1 Flamengo 2 +12.6
+0.4
Bangu 1 Macae 0 +4.5
+0.1
Botafogo 3 Friburguense 1 -0.1
Week of 4/15100.0*Chance in playoffs100.0*Average seed
Boavista 1 Botafogo 1 +0.3
Flamengo 3 Americano 1 +0.3
Points
Chance Will Make Playoffs