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 -6.5
-2.9
Treviso 0 Gloucester 41 -0.3
Grenoble 31 Newcastle 27 +0.2
Bristol 22 Bath 57 -0.1
If winner is:HomeDrawAway
Ospreys vs Lyon+0.4*-0.0-1.4
+0.0+0.0-0.1
Saracens vs Stade Français+1.0+0.3-0.2
If winner is:HomeDrawAway
Week of 1/19100.0*Chance in playoffs100.0*Average seed
Stade Français vs Harlequins-5.6+5.7+5.7
-0.4+0.3+0.4
Edinburgh vs Saracens-0.1*+0.0+2.0
-0.1+2.0+2.0
Cardiff vs Bristol-0.2+1.2+1.1
-0.0+0.1+0.1
Lyon vs Grenoble-0.2+0.9+1.1
-0.0+0.0+0.1
La Rochelle vs Treviso-0.2*+0.1+1.1
-0.0+0.1+0.2
Gloucester vs Bayonne-0.0*+0.1+0.8
-0.0+0.1+0.1
Newcastle vs Ospreys-0.4-0.4+0.1
-0.0-0.1+0.0
Worcester vs Enisey+0.0+0.5-0.0

* 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 Harlequins finish out the regular season.   Explain

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs1234567891011121314151617181920Count
161-0-0100.0%1310081131009,277,916
140-1-0100.002100742020132,047
120-0-188.755241064100009,534,197
Total:94.3%0100068195321000018,944,160
Games Above .500
Chance Will Make Playoffs