How are these numbers calculated?

Big Games

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

Week of 4/7100.0*Chance in playoffs100.0*Average seed
Deportivo Tachira 0 Sporting Cristal 0 In
Guarani 2 Racing 0 -1.7
Week of 4/14100.0*Chance in playoffs100.0*Average seed
Racing 3 Deportivo Tachira 2 +0.4
Sporting Cristal 1 Guarani 1 +0.2
Week of 4/21None
Chance Will Make Playoffs