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
Hekari United 0 Team Wellington 2 +29.2
+29.2
+1.5
Team Wellington 2 Tefana 1 +24.5
+24.5
+1.9
Auckland City 3 Western United 0 -2.4
-2.4
-0.1
Suva 2 Amicale 3 -2.3
-2.3
-0.1
Pirae 3 Lupe ole Soaga 3 +2.0
+2.0
+0.1
Ba 3 Gaïtcha 0 -0.6
-0.6
-0.0
Tafea 2 Hekari United 3 -0.5
-0.5
Western United 0 Amicale 1 -0.5
-0.5
-0.0
Ba 3 Lupe ole Soaga 1 -0.2
-0.2
-0.1
Suva 0 Auckland City 3 -0.2
-0.2
-0.0
Gaïtcha 5 Pirae 2 +0.0
If winner is:HomeDrawAway
Tafea vs Team Wellington-45.9InIn
-45.9YesYes
-2.1-0.4+0.4
Tefana vs Tafea+0.3+1.9-1.1
+0.3+1.9-1.1
Tefana vs Hekari United+0.1+1.7-0.8
+0.1+1.7-0.8
If winner is:HomeDrawAway
Week of 4/18100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Amicale vs Auckland City-1.1-2.3+1.1
-1.1-2.3+1.1
+0.1+0.3-0.1
Gaïtcha vs Lupe ole Soaga-1.3+1.4+1.4
-1.3+1.4+1.4
Ba vs Pirae-0.0-0.1+0.8
-0.0-0.1+0.8
-0.1+0.4+0.6

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsPlayoffs123456789101112Count
91-0-0InYes28373512,319,046
70-1-0InYes6943,333,706
60-0-148.3%48.3%01731301842,005,040
Total:94.1%94.1%192744432017,657,792
Points
Chance Will Make Playoffs