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
Brazil 3 Japan 0 +26.6
+0.7
Brazil 2 Mexico 0 +9.0
+0.2
Italy 4 Japan 3 In
-0.0
Mexico 1 Italy 2 +0.1
-0.0
Week of 6/22100.0*Chance in playoffs100.0*Average seed
Italy 2 Brazil 4 +0.1
Points
Chance Will Make Playoffs