How are these numbers calculated?

Big Games

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

Week of 6/15100.0*Chance in playoffs100.0*Average seed
Mexico 1 Italy 2 +33.2
+0.6
Italy 4 Japan 3 In
+0.2
Brazil 2 Mexico 0 +4.0
Brazil 3 Japan 0 -0.5
Week of 6/22100.0*Chance in playoffs100.0*Average seed
Italy 2 Brazil 4 -0.1
Points
Chance Will Make Playoffs