How are these numbers calculated?

Big Games

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

Week of 11/22100.0*Relegated to Fédérale 1100.0*Average seed
Bourgoin 14 Montauban 20 +21.8
-2.1
Narbonne 36 Tarbes 23 +5.2
-0.0
Massy 50 Dax 13 +4.9
-0.1
Albi 34 Carcassonne 22 +0.1
Aurillac 20 Colomiers 13 -0.0
Biarritz 42 Agen 18 +0.0
Week of 11/29100.0*Relegated to Fédérale 1100.0*Average seed
Tarbes 26 Massy 7 +26.7
-0.3
Colomiers 24 Bourgoin 17 +17.5
-0.6
Agen 22 Dax 17 +3.4
-0.1
Béziers 16 Carcassonne 12 +0.0
Week of 12/7100.0*Relegated to Fédérale 1100.0*Average seed
Narbonne 7 Biarritz 20 -20.0
+0.2
Games Above .500
Chance Will Win Championship