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*Chance in playoffs100.0*Average seed
Asteras 2 Apollon 1 +15.5
+0.2
Xanthi 1 Larissa 0 -11.1
-0.1
Platanias 1 Panionios 2 -0.6
-0.0
Olympiakos 4 Panetolikos 0 +0.2
+0.0
Levadiakos 0 Atromitos 1 +0.1
Week of 5/6100.0*Chance in playoffs100.0*Average seed
Panathinaikos 1 Xanthi 2 -29.3
-0.3
Panetolikos 0 Asteras 2 +22.3
+0.2
Points
Chance Will Make Playoffs