How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Tuesday, 5/24100.0*Chance wins title100.0*UEFA CL100.0*Europa League100.0*Average seed
Panionios 0 PAOK 1 +21.3
+21.3
-21.3
+0.4
Panathinaikos 1 AEK 0 +7.6
+7.6
-7.6
+0.1
Saturday, 5/28100.0*Chance wins title100.0*UEFA CL100.0*Europa League100.0*Average seed
AEK 1 PAOK 0 -17.6
-17.6
+17.6
-0.2
Panathinaikos 1 Panionios 0 -2.9
-2.9
+2.9
Tuesday, 5/31100.0*Chance wins title100.0*UEFA CL100.0*Europa League100.0*Average seed
PAOK 2 Panathinaikos 3 -35.0
-35.0
+35.0
-0.5
Panionios 1 AEK 2 -27.0
-27.0
+27.0
-0.4
Points
Chance Will Win Championship