How are these numbers calculated?

Big Games

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

Week of 9/19100.0*Average seed
Sembawang 0 Tampines 7 +0.7
Gombak 1 Woodlands 4 -0.2
Geylang 5 Balestier 1 -0.1
SAFFC 1 Home 1 +0.0
Week of 9/26100.0*Average seed
Geylang 1 Tampines 2 +0.9
Sembawang 0 Woodlands 3 -0.2
Clementi 0 Home 2 -0.1
Week of 10/3100.0*Average seed
Tampines 1 T. Pagar 1 +0.5
Sengkang 1 Geylang 4 -0.2
Woodlands 2 Clementi 1 -0.2
Home 2 Sembawang 0 -0.1
Points
Chance Will Win Championship