How are these numbers calculated?

Big Games

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

Week of 11/29100.0*Chance in playoffs100.0*Average seed
Real Betis 1 Olympiakos Pira 0 In
Milan 5 F91 Dudelange 2 -14.1
Week of 12/13100.0*Chance in playoffs100.0*Average seed
Olympiakos Pira 3 Milan 1 +0.2
F91 Dudelange 0 Real Betis 0 -0.1
Chance Will Make Playoffs