How are these numbers calculated?

Big Games

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

Week of 9/10100.0*Chance in playoffs100.0*Average seed
Doncaster 24 Newcastle 28 +6.0
-0.2
Keighley 28 Workington 6 +1.6
+0.5
If winner is:HomeDrawAway
Toronto vs Doncaster+2.6-9.2Out
+0.0-0.1-0.2
If winner is:HomeDrawAway
Week of 9/17100.0*Chance in playoffs100.0*Average seed
Barrow vs KeighleyOut+6.4+63.8
-0.3+0.2+1.0
York vs Newcastle+1.6+1.6-3.2
+0.3-0.4-0.4

What If

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

100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsChampionship12345678Count
691-0-081.7%No82171278,332,005
680-1-024.3No24542146,763,858
670-0-1OutNo51491,012,699,753
Total:17.8%No1844381,337,795,616
Games Above .500
Chance Will Make Playoffs