How are these numbers calculated?

Big Games

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

Week of 11/24100.0*Average seed
Dave 88.54 Tom H 112.22 +0.2
Justin 92.66 Tom K 89.34 +0.1
Week of 12/1100.0*Average seed
Laurel 99.06 Tom H 84.46 -0.6
Erica 85.38 Dave 97.96 -0.4
Tom K 59.98 Eric 102.96 +0.1
Games Above .500
Chance Will Make Playoffs