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 -4.2
-0.0
Botafogo 2 Madureira 1 -0.1
Week of 3/19100.0*Chance in playoffs100.0*Average seed
Bangu 2 Americano 0 +26.0
+0.6
Cabofriense 1 Volta Redonda 1 +15.3
+0.2
Resende 0 Vasco da Gama 2 -1.7
-0.1
Madureira 0 Flamengo 2 -0.2
Week of 3/23100.0*Chance in playoffs100.0*Average seed
Vasco da Gama 1 Bangu 2 In
+0.6
Flamengo 3 Fluminense 2 +0.4
Points
Chance Will Make Playoffs