How are these numbers calculated?

Big Games

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

Week of 3/18100.0*Chance in playoffs100.0*Average seed
Portuguesa 2 Macae 1 Out
-0.7
Volta Redonda 3 Madureira 2 -0.1
Resende 0 Flamengo 1 +0.1
Week of 3/22100.0*Chance in playoffs100.0*Average seed
Macae 1 Resende 2 -0.5
Boavista 1 Volta Redonda 0 -0.1
Flamengo 3 Bangu 0 +0.1
Portuguesa 2 Madureira 0 -0.1
Nova Iguacu 0 Portuguesa 0 +0.0
Week of 3/29100.0*Chance in playoffs100.0*Average seed
Bangu 2 Macae 0 -0.1
Points
Chance Will Make Playoffs