How are these numbers calculated?

Big Games

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

Week of 1/11100.0*Chance in playoffs100.0*Promoted100.0*Average seed
Edinburgh 17 Munster 26 -14.9
-0.2
Ospreys 15 Tigers 15 +4.2
+0.1
Toulouse 35 Treviso 14 -2.6
-0.0
Zebre 6 Biarritz 32 +18.2
+0.5
Quins 47 Connacht 8 +0.2
Saints 18 Castres 12 +6.2
+0.1
Ulster 23 Glasgow 6 +6.4
+0.1
Leinster 33 Scarlets 14 -4.1
-0.2
Week of 1/18100.0*Chance in playoffs100.0*Promoted100.0*Average seed
Biarritz 9 Quins 16 -0.6
Chiefs 20 Leinster 29 -0.2
Tigers 9 Toulouse 5 -0.5
Games Above .500
Chance Will Make Playoffs