How are these numbers calculated?

Big Games

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

Week of 7/18100.0*Chance wins title100.0*Average seed
T. Pagar 2 Jurong 1 +19.8
+0.3
SAFFC 4 Sembawang 0 -7.4
-0.1
Week of 7/25100.0*Chance wins title100.0*Average seed
Gombak 1 T. Pagar 3 +17.9
+0.3
Woodlands 0 SAFFC 3 -8.3
-0.1
Balestier 1 Geylang 0 +7.1
+0.2
Week of 8/1100.0*Chance wins title100.0*Average seed
T. Pagar 5 Woodlands 2 Yes
+0.3
SAFFC 1 Gombak 0 -9.6
-0.1
Points
Chance Will Win Championship