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
Erica 60.14 Ethan 78 -0.2
Jenn 75.58 Eric 99.54 +0.1
Week of 12/1100.0*Average seed
Tom K 59.98 Eric 102.96 +0.3
Shara 91.96 Ethan 113.3 -0.2
Games Above .500
Chance Will Make Playoffs