How are these numbers calculated?

Big Games

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

Week of 2/20100.0*Chance in playoffs100.0*Grupo D100.0*Average seed
Tigres do Brasil 0 Vasco da Gama 2 +0.0
-0.0
+0.1
Boavista 1 Volta Redonda 1 +0.1
Vasco da Gama 2 Friburguense 2 -0.1
Week of 2/27None
Week of 3/5100.0*Chance in playoffs100.0*Grupo D100.0*Average seed
Bonsucesso 1 Vasco da Gama 3 +0.0
Points
Chance Will Make Playoffs