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
Bristol 22 Bath 57 -3.7
-0.3
Pau 21 Cardiff 22 +2.9
+0.3
Harlequins 18 Edinburgh 23 -0.9
+0.1
Grenoble 31 Newcastle 27 +0.4
Treviso 0 Gloucester 41 -0.3
Dragons 34 Enisey 10 +0.0
If winner is:HomeDrawAway
Ospreys vs Lyon+3.6-6.8-12.3
+0.1-0.1-0.2
Saracens vs Stade Français+5.2+4.1-1.0
+0.2+0.1-0.0
If winner is:HomeDrawAway
Week of 1/19100.0*Chance in playoffs100.0*Average seed
Bath vs Pau-1.5+45.1+45.7
-0.1+3.9+3.9
Cardiff vs Bristol+5.7-20.0-29.8
+0.3-0.3-1.9
Lyon vs Grenoble-2.2+4.2+12.4
-0.0+0.1+0.3
Edinburgh vs Saracens-0.4+2.5+9.6
-0.0+0.1+0.3
La Rochelle vs Treviso-1.4*-0.3+7.7
-0.0+0.0+0.2
Gloucester vs Bayonne-0.2*+0.3+6.1
-0.0+0.0+0.2
Stade Français vs Harlequins-3.0+1.4+3.0
-0.1+0.0+0.1
Worcester vs Enisey+0.5+4.4-0.2
+0.0+0.2-0.0
Newcastle vs Ospreys-3.1*-0.2+0.8
-0.1-0.0+0.0
Brive vs Dragons-0.1+3.0*+0.0
-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 Cardiff finish out the regular season.   Explain

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs1234567891011121314151617181920Count
201-0-046.0%0012141227341730015,869,047
180-1-020.40210117452960132,249
160-0-110.50010292396676100002,942,864
Total:40.3%00011310243318411110000018,944,160
Games Above .500
Chance Will Make Playoffs