How are these numbers calculated?

Big Games

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

Week of 4/3100.0*Chance in playoffs100.0*Average seed
Platanias 3 Xanthi 1 +1.3
+0.6
Panionios 3 PAOK 1 -1.0
Atromitos 1 Panetolikos 0 -0.1
Iraklis 0 Asteras 1 -0.1
Levadiakos 1 Giannina 1 +0.1
Iraklis 0 Olympiakos 2 +0.0
Week of 4/10100.0*Chance in playoffs100.0*Average seed
Giannina 2 Platanias 0 Out
-0.6
PAOK 2 Levadiakos 0 Out
AEK 2 Panionios 0 -0.1
Kalloni 2 Atromitos 4 -0.2
Asteras 0 Panathinaikos 0 +0.1
Week of 4/17100.0*Chance in playoffs100.0*Average seed
Platanias 0 PAOK 0 -0.9
Panionios 0 Atromitos 1 -0.4
Xanthi 0 Giannina 1 -0.3
Asteras 2 Veria 1 -0.1
Iraklis 0 Panetolikos 0 +0.1
Points
Chance Will Make Playoffs