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
Bayonne 14 La Rochelle 24 -0.1
-0.1
Bristol 22 Bath 57 +0.0
Treviso 0 Gloucester 41 +0.1
Pau 21 Cardiff 22 +0.0
If winner is:HomeDrawAway
Week of 1/19100.0*Chance in playoffs100.0*Average seed
Gloucester vs BayonneOutOut+2.1
-0.1+0.6+1.9
La Rochelle vs Treviso+0.1-0.1-0.3
Cardiff vs Bristol+0.0-0.1-0.1
Edinburgh vs Saracens+0.0-0.0-0.1
Newcastle vs Ospreys-0.1-0.1+0.0
Bath vs Pau+0.0-0.3-0.3
Worcester vs Enisey-0.0-0.1+0.0

What If

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

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs1234567891011121314151617181920Count
41-0-02.2%101233461022311610471,990
20-1-0Out00042043312132,525
00-0-1Out00002112831252018,339,645
Total:0.1%000000002112831242018,944,160
Games Above .500
Chance Will Make Playoffs