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
Stade Français 37 Bordeaux Begles 23 +2.8
+2.8
+0.3
Racing Metro 22 Clermont 6 -2.0
-2.0
-0.0
Oyonnax 19 Toulouse 19 +1.8
+1.8
Biarritz 19 Brive 13 +0.1
+0.1
+0.3
Week of 5/3100.0*Chance in playoffs100.0*European Rugby Champions Cup Berth100.0*Average seed
Toulon 17 Stade Français 15 Out
No
-0.3
Bayonne 23 Castres 13 +8.2
+8.2
+0.1
Toulouse 38 Grenoble 8 -4.4
-4.4
-0.1
Bordeaux Begles 54 Biarritz 20 -0.1
Games Above .500
Chance Will Make Playoffs