How are these numbers calculated?

Big Games

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

Week of 4/26100.0*Chance in playoffs100.0*Average seed
The Strongest 2 Quilmes 1 +14.7
Week of 5/3None
Week of 5/10100.0*Chance in playoffs100.0*Average seed
Quilmes 1 Universidad de Chile 1 In
Sao Paulo 3 The Strongest 0 In
Chance Will Make Playoffs