How are these numbers calculated?

Big Games

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

Week of 3/2100.0*Chance in playoffs100.0*Average seed
Botafogo 2 Bragantino 1 +8.2
+0.1
Bragantino 0 Sao Paulo 2 +7.0
+0.1
Sao Bento 1 Corinthians 1 +2.8
+0.1
Week of 3/10100.0*Chance in playoffs100.0*Average seed
Ferroviaria 2 Sao Caetano 0 In
+0.3
Bragantino 0 Ituano 3 +4.0
+0.0
Corinthians 0 Santos 0 -0.3
+0.0
Week of 3/16100.0*Chance in playoffs100.0*Average seed
Corinthians 1 Oeste 0 -0.3
Ituano 0 Corinthians 1 -0.3
Novorizontino 1 Ferroviaria 1 -0.3
Points
Chance Will Make Playoffs