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 -20.4
-20.4
-1.8
Pirae 3 Lupe ole Soaga 3 +2.0
+2.0
+0.1
Suva 2 Amicale 3 -0.6
-0.6
+0.1
Auckland City 3 Western United 0 -0.6
-0.6
+0.1
Ba 3 Gaïtcha 0 -0.5
-0.5
-0.0
Tafea 2 Hekari United 3 -0.5
-0.5
Western United 0 Amicale 1 -0.5
-0.5
-0.0
Hekari United 0 Team Wellington 2 -0.4
-0.4
+0.0
Suva 0 Auckland City 3 -0.2
-0.2
-0.0
Gaïtcha 5 Pirae 2 +0.1
+0.1
-0.0
Ba 3 Lupe ole Soaga 1 +0.1
+0.1
+0.0
If winner is:HomeDrawAway
Tefana vs Tafea+15.6OutOut
+15.6NoNo
+2.0+0.1-1.7
Tefana vs Hekari United+15.1OutOut
+15.1NoNo
+2.1-0.1-1.7
Tafea vs Team Wellington+2.9-0.4-0.4
+2.9-0.4-0.4
-0.1-0.1+0.1
If winner is:HomeDrawAway
Week of 4/18100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Amicale vs Auckland City-0.2-7.4+2.3
-0.2-7.4+2.3
-0.0-0.1+0.0
Gaïtcha vs Lupe ole Soaga-1.3+1.4+1.4
-1.3+1.4+1.4
+0.0+0.1-0.1
Ba vs Pirae-0.2-0.1+2.5
-0.2-0.1+2.5
+0.0-0.1-0.4
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
62-0-065.7%65.7%09572952,428,243
41-1-0OutNo3463302,470,379
31-0-1OutNo14422714305,761,796
20-2-0OutNo10493470628,915
10-1-1OutNo1927322752,938,376
00-0-2OutNo43573,430,083
Total:9.0%9.0%0189141512107131217,657,792
Points
Chance Will Make Playoffs