How are these numbers calculated?

Big Games

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

Week of 4/19100.0*Average seed
Scarlets 24 Blues 6 -0.1
Connacht 18 Ulster 34 +0.1
Treviso 30 Edinburgh 10 +0.1
Week of 4/26None
Week of 5/3100.0*Average seed
Ulster 37 Blues 13 -0.1
Connacht 3 Glasgow 20 +0.1
Games Above .500
Chance Will Make Playoffs