How are these numbers calculated?

Big Games

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

Week of 4/11100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Western United 0 Amicale 1 -18.4
-18.4
-2.0
Auckland City 3 Western United 0 -2.3
-2.3
-0.6
Pirae 3 Lupe ole Soaga 3 +1.8
+1.8
+0.1
Ba 3 Gaïtcha 0 -0.5
-0.5
Suva 2 Amicale 3 -0.2
-0.2
+0.0
Suva 0 Auckland City 3 +0.2
+0.2
Team Wellington 2 Tefana 1 -0.1
-0.1
Tafea 2 Hekari United 3 -0.1
-0.1
Ba 3 Lupe ole Soaga 1 +0.0
Gaïtcha 5 Pirae 2 -0.1
If winner is:HomeDrawAway
Tafea vs Team Wellington-0.2-0.1+0.1
Tefana vs Hekari United-0.1-0.1+0.1
Tefana vs Tafea+0.1-0.1-0.0
If winner is:HomeDrawAway
Week of 4/18100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Suva vs Western United-0.9+0.2+3.2
Ba vs Pirae+0.0-0.1-0.2
Gaïtcha vs Lupe ole Soaga+0.1-0.0-0.1

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsPlayoffs123456789101112Count
31-0-0OutNo3394513102,793,882
10-1-0OutNo073343173,333,023
00-0-1OutNo217911,530,887
Total:OutNo06736225517,657,792
Points
Chance Will Make Playoffs