How are these numbers calculated?

Big Games

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

Week of 3/21100.0*Chance in playoffs
Santos 1 Audax Osasco 0 +0.0
Capivariano 2 Corinthians 3 +0.0
Corinthians 2 Portuguesa 0 In
Week of 3/28None
Week of 4/4None
Chance Will Make Playoffs