How are these numbers calculated?

Big Games

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

Week of 4/3100.0*Chance in playoffs100.0*Average seed
Resende 0 Fluminense 2 -3.1
-0.3
Audax Rio 1 Macae 0 +2.6
+0.0
Bangu 1 Boavista 1 +1.0
Flamengo 1 Duque de Caxias 1 +0.1
Week of 4/10100.0*Chance in playoffs100.0*Average seed
Resende 2 Audax Rio 1 In
+0.2
Macae 1 Bangu 0 -0.8
Flamengo 3 Fluminense 1 +0.4
Week of 4/21100.0*Chance in playoffs100.0*Average seed
Boavista 1 Resende 3 +0.3
Fluminense 2 Bangu 0 -0.2
Points
Chance Will Make Playoffs