How are these numbers calculated?

Big Games

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

Week of 4/6100.0*Average seed
Gremio 2 Junior 0 +0.1
Week of 4/13100.0*Average seed
Junior 1 Leon de Huanuco 1 +0.4
Oriente Petrolero 3 Gremio 0 -0.3
Week of 4/20None
Chance Will Make Playoffs