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*Chance in playoffs100.0*European Rugby Champions Cup Berth100.0*Average seed
Racing Metro 22 Clermont 6 In
Yes
+0.5
Stade Français 37 Bordeaux Begles 23 +2.4
+2.4
+0.0
Oyonnax 19 Toulouse 19 +0.3
+0.3
+0.1
Perpignan 31 Toulon 46 -0.1
Week of 5/3100.0*Chance in playoffs100.0*European Rugby Champions Cup Berth100.0*Average seed
Montpellier 44 Racing Metro 10 -0.8
Bayonne 23 Castres 13 +0.3
Clermont 25 Perpignan 22 -0.1
Toulon 17 Stade Français 15 -0.0
Games Above .500
Chance Will Make Playoffs