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
Perpignan 31 Toulon 46 +0.7
Racing Metro 22 Clermont 6 +0.1
Oyonnax 19 Toulouse 19 +0.0
Week of 5/3100.0*Average seed
Toulon 17 Stade Français 15 +0.3
Montpellier 44 Racing Metro 10 -0.1
Clermont 25 Perpignan 22 -0.0
Games Above .500
Chance Will Make Playoffs