How are these numbers calculated?

Big Games

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

Week of 7/22100.0*Chance in playoffs100.0*Average seed
Corinthians 1 Palmeiras 0 -6.5
-0.4
Ponte Preta 2 Novorizontino 0 In
Santos 1 Santo Andre 1 -0.2
+0.1
Santo Andre 1 Ituano 3 +0.4
Palmeiras 2 Agua Santa 1 +0.1
Points
Chance Will Make Playoffs