How are these numbers calculated?

Big Games

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

Week of 11/23100.0*Chance in playoffs100.0*Average seed
Everton 1 Atalanta 5 In
+0.0
Olympique Lyonn 4 Apollon 0 In
-0.1
Week of 12/7100.0*Chance in playoffs100.0*Average seed
Atalanta 1 Olympique Lyonn 0 +0.6
Points
Chance Will Make Playoffs