How are these numbers calculated?

Big Games

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

Week of 1/12100.0*Chance in playoffs100.0*Average seed
Harlequins 18 Edinburgh 23 -1.9
-0.1
Treviso 0 Gloucester 41 -1.0
Grenoble 31 Newcastle 27 +0.7
+0.2
Bristol 22 Bath 57 -0.5
+0.0
Pau 21 Cardiff 22 -0.1
Dragons 34 Enisey 10 -0.1
-0.1
Brive 17 Worcester 14 -0.1
If winner is:HomeDrawAway
Saracens vs Stade Français-16.4-13.2+3.1
-1.9-0.6+0.3
Ospreys vs Lyon+1.1-0.4-4.0
+0.1-0.1-0.2
If winner is:HomeDrawAway
Week of 1/19100.0*Chance in playoffs100.0*Average seed
Edinburgh vs Saracens-1.1+0.5+27.9
-0.1-0.0+2.2
Stade Français vs Harlequins+12.9-7.9-13.2
+1.1+0.1-1.1
Cardiff vs Bristol-0.6+3.4+3.3
-0.0+0.0+0.1
Lyon vs Grenoble-0.6+2.5+3.3
-0.0+0.1+0.2
La Rochelle vs Treviso-0.6*+0.1+3.2
-0.0+0.0+0.1
Gloucester vs Bayonne-0.1*-0.1+2.5
Newcastle vs Ospreys-1.2-0.6+0.3
-0.2-0.0+0.0
Worcester vs Enisey+0.1+1.3-0.1
+0.0+0.2-0.0
Brive vs Dragons-0.1+0.8+0.1
-0.1-0.1+0.2
Bath vs Pau+0.0-0.1-0.0

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

What If

Chances based on how well the Stade Français finish out the regular season.   Explain

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs1234567891011121314151617181920Count
162-0-040.6%001211210151722165008,026,072
141-1-019.2261116302680178,131
121-0-112.714811212111676211009,244,202
0-2-00.3063642141907
100-1-10.10421271581083210084,501
80-0-20.0002121713111412665311,410,347
Total:23.6%00011561013211984541110018,944,160
Games Above .500
Chance Will Make Playoffs