How are these numbers calculated?

Big Games

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

Week of 8/21100.0*Average seed
Dragons 2 Broncos 12 -0.2
Bulldogs 28 Roosters 4 -0.1
Titans 20 Sharks 10 -0.1
Week of 8/28100.0*Average seed
Rabbitohs 41 Dragons 6 -0.3
Bulldogs 40 Warriors 20 -0.2
Titans 36 Tigers 24 -0.1
Week of 9/4100.0*Average seed
Dragons 37 Eels 0 +0.5
Tigers 34 Bulldogs 12 +0.2
Games Above .500
Chance Will Make Playoffs