How are these numbers calculated?

Big Games

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

Week of 5/2100.0*Average seed
Exeter 29 Harlequins 30 +0.3
Week of 5/10100.0*Average seed
Worcester 28 Gloucester 27 -0.3
Newcastle 13 Exeter 23 -0.3
Games Above .500
Chance Will Make Playoffs