How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Thursday100.0*Chance in playoffs100.0*Average seed
Fluminense 2 Portuguesa 0 -4.5
-0.3
Sao Paulo 3 Vitoria 2 +2.6
+0.2
Parana 1 Gremio 1 +2.1
+0.1
Sunday100.0*Chance in playoffs100.0*Average seed
Cruzeiro 2 Goias 0 Out
-1.8
Ponte Preta 2 Fluminense 3 -8.4
Gremio 1 Atletico-MG 0 -8.3
-0.2
Sao Caetano 3 Santos 2 +4.9
+0.2
Gama 4 Coritiba 0 +4.7
+0.3
Vitoria 4 Palmeiras 3 -0.4
Points
Chance Will Make Playoffs