How are these numbers calculated?

Big Games

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

Week of 3/25100.0*Chance in playoffs100.0*Average seed
Universitario 3 The Strongest 3 -10.4
Atletico-PR 1 Velez Sarsfield 3 +8.0
Week of 4/1None
Week of 4/8100.0*Chance in playoffs100.0*Average seed
The Strongest 2 Atletico-PR 1 In
Chance Will Make Playoffs