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*Seletiva100.0*Average seed
Botafogo 2 Madureira 1 +11.6
-0.3
Boavista 0 Fluminense 3 -0.1
Week of 3/19100.0*Seletiva100.0*Average seed
Bangu 2 Americano 0 -12.6
+0.1
Madureira 0 Flamengo 2 +5.7
-0.1
Botafogo 4 Portuguesa 1 -3.1
+0.0
Week of 3/23100.0*Seletiva100.0*Average seed
Madureira 0 Cabofriense 0 -0.8
+0.0
Americano 2 Botafogo 2 -0.4
Points
Chance Will Make Playoffs