How are these numbers calculated?

Big Games

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

Week of 4/3None
Week of 4/10100.0*Chance in playoffs100.0*Average seed
Fluminense 0 Boca Juniors 2 In
Zamora 0 Arsenal 1 -2.8
Week of 4/17100.0*Chance in playoffs100.0*Average seed
Boca Juniors 2 Zamora 0 +0.4
Arsenal 1 Fluminense 2 -0.2
Chance Will Make Playoffs