How are these numbers calculated?

Big Games

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

Week of 11/28100.0*Chance in playoffs100.0*Average seed
Manchester United 1 Young Boys 0 +23.8
+0.5
Juventus 1 Valencia 0 +5.5
-0.1
Week of 12/12100.0*Chance in playoffs100.0*Average seed
Valencia 2 Manchester United 1 -0.2
Young Boys 2 Juventus 1 +0.1
Points
Chance Will Make Playoffs