How are these numbers calculated?

Big Games

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

Week of 4/10100.0*Chance in playoffs100.0*Average seed
Real Potosi 3 Parana 1 -34.0
-0.3
Week of 4/18100.0*Chance in playoffs100.0*Average seed
Flamengo 1 Real Potosi 0 +31.4
+0.3
Parana 2 Union Maracaibo 1 +31.3
+0.3
Week of 4/24None
Points
Chance Will Make Playoffs