How are these numbers calculated?

Big Games

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

Week of 4/23100.0*Chance in playoffs100.0*Average seed
Larissa 1 Xanthi 0 Out
-0.1
Levadiakos 0 AEK 2 -3.9
Panathinaikos 1 Atromitos 0 -1.3
Platanias 1 PAOK 3 +0.1
Week of 4/30None
Points
Chance Will Make Playoffs