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
Team Wellington 2 Tefana 1 -20.9
-20.9
-2.0
Pirae 3 Lupe ole Soaga 3 +1.9
+1.9
+0.1
Suva 2 Amicale 3 -0.9
-0.9
+0.1
Auckland City 3 Western United 0 -0.8
-0.8
+0.1
Hekari United 0 Team Wellington 2 -0.6
-0.6
+0.0
Western United 0 Amicale 1 -0.5
-0.5
-0.0
Suva 0 Auckland City 3 -0.4
-0.4
-0.0
Ba 3 Gaïtcha 0 -0.4
-0.4
-0.0
Tafea 2 Hekari United 3 -0.4
-0.4
Gaïtcha 5 Pirae 2 +0.3
+0.3
-0.0
Ba 3 Lupe ole Soaga 1 -0.2
-0.2
+0.1
If winner is:HomeDrawAway
Tefana vs Tafea+21.5OutOut
+21.5NoNo
+2.2-0.3-2.0
Tefana vs Hekari United+21.4OutOut
+21.4NoNo
+2.2-0.3-2.0
Tafea vs Team Wellington+1.5-1.0-1.0
+1.5-1.0-1.0
-0.0-0.1+0.1
If winner is:HomeDrawAway
Week of 4/18100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Amicale vs Auckland City+1.0-4.9+1.2
+1.0-4.9+1.2
+0.0-0.1+0.0
Ba vs Pirae-1.0-1.0+1.5
-1.0-1.0+1.5
+0.2+0.1-0.2
Gaïtcha vs Lupe ole Soaga-0.9+0.6+0.6
-0.9+0.6+0.6
+0.0+0.1-0.1
Suva vs Western United-0.0+0.1-0.0

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsPlayoffs123456789101112Count
62-0-089.0%89.0%123938101898,442
41-1-0OutNo3551131835,576
31-0-1OutNo4263624921,795,135
20-2-0OutNo32240287194,425
10-1-1OutNo021232468834,521
00-0-2OutNo3070899,045
Total:14.7%14.7%26679111311913135,457,144
Points
Chance Will Make Playoffs