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
Ba 3 Gaïtcha 0 -20.6
-20.6
-2.0
Gaïtcha 5 Pirae 2 +18.7
+18.7
+2.2
Pirae 3 Lupe ole Soaga 3 +1.7
+1.7
Ba 3 Lupe ole Soaga 1 -1.5
-1.5
+0.0
Suva 2 Amicale 3 -1.0
-1.0
+0.1
Auckland City 3 Western United 0 -0.8
-0.8
+0.1
Suva 0 Auckland City 3 -0.4
-0.4
-0.0
Western United 0 Amicale 1 -0.4
-0.4
-0.0
Tafea 2 Hekari United 3 -0.3
-0.3
Team Wellington 2 Tefana 1 -0.2
-0.2
Hekari United 0 Team Wellington 2 +0.2
+0.2
+0.0
If winner is:HomeDrawAway
Tefana vs Hekari United*+0.1+5.2-2.5
*+0.1+5.2-2.5
+0.0+0.1-0.1
Tafea vs Team Wellington+4.4-3.1-3.0
+4.4-3.1-3.0
-0.0-0.1+0.1
Tefana vs Tafea-1.8+3.4+0.2
-1.8+3.4+0.2
-0.0+0.2-0.0
If winner is:HomeDrawAway
Week of 4/18100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Gaïtcha vs Lupe ole Soaga+44.2OutOut
+44.2NoNo
+2.5+0.1-2.6
Amicale vs Auckland City+1.7-13.7+4.7
+1.7-13.7+4.7
+0.0-0.3+0.1
Ba vs Pirae-4.2-4.1+6.1
-4.2-4.1+6.1
+0.1+0.1-0.1
Suva vs Western United-0.1+0.3-0.1

* A starred number could be exactly 0 or just really small. The simulation did not run long enough to know.

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-LplayoffsPlayoffs123456789101112Count
61-0-074.3%74.3%5274221402,213,616
40-1-0OutNo9553241,030,023
30-0-1OutNo0422422752,213,505
Total:30.2%30.2%211171012810171125,457,144
Points
Chance Will Make Playoffs