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 -0.0
Week of 8/28100.0*Average seed
Rabbitohs 41 Dragons 6 +0.3
Bulldogs 40 Warriors 20 +0.1
Titans 36 Tigers 24 -0.0
Week of 9/4100.0*Average seed
Tigers 34 Bulldogs 12 -0.6
Dragons 37 Eels 0 -0.1
Sea Eagles 38 Titans 4 +0.1
Games Above .500
Chance Will Make Playoffs