How are these numbers calculated?

Big Games

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

Week of 4/29100.0*Average seed
Asteras 2 Apollon 1 -0.3
Lamia 2 Giannina 1 -0.1
Xanthi 1 Larissa 0 +0.1
Week of 5/6100.0*Average seed
Apollon 0 AEK 1 -0.4
Larissa 1 Lamia 1 -0.2
Giannina 3 Olympiakos 0 -0.1
Points
Chance Will Make Playoffs