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
Biarritz 19 Brive 13 Out
No
-0.8
Stade Français 37 Bordeaux Begles 23 +1.3
+1.3
Oyonnax 19 Toulouse 19 -0.9
-0.9
Week of 5/3100.0*Chance in playoffs100.0*European Rugby Champions Cup Berth100.0*Average seed
Bordeaux Begles 54 Biarritz 20 -0.1
Brive 19 Oyonnax 17 +0.0
Games Above .500
Chance Will Make Playoffs