How are these numbers calculated?

Big Games

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

Week of 4/2100.0*Chance in playoffs100.0*Average seed
Nacional 4 Toluca 0 In
Boca Juniors 1 Barcelona 0 -2.2
Week of 4/9None
Week of 4/16100.0*Chance in playoffs100.0*Average seed
Toluca 3 Boca Juniors 2 +0.3
Barcelona 1 Nacional 0 -0.2
Chance Will Make Playoffs