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
Pirae 4 Auckland City 11 -0.7
-0.7
+0.0
If winner is:HomeDrawAway
Western United vs Amicale+16.6-9.1-31.6
+16.6-9.1-31.6
+0.8-0.3-1.7
Auckland City vs Western United-21.2-0.6+18.1
-21.2-0.6+18.1
-1.5+0.0+1.2
Ba vs Gaïtcha-1.5+2.8+4.8
-1.5+2.8+4.8
-0.1+0.1+0.2
Tafea vs Team Wellington-1.4+2.4+1.3
-1.4+2.4+1.3
-0.1+0.1+0.1
Hekari United vs Team Wellington-1.4+2.4+1.3
-1.4+2.4+1.3
-0.1+0.1+0.1
Tafea vs Hekari United-0.6+2.5-0.6
-0.6+2.5-0.6
-0.0+0.1-0.0
Tefana vs Hekari United+0.1+1.1-0.9
+0.1+1.1-0.9
-0.1+0.1+0.1
Tefana vs Tafea+0.1+1.0-0.9
+0.1+1.0-0.9
-0.1+0.1+0.1
If winner is:HomeDrawAway
Week of 4/18100.0*Chance in playoffs100.0*Playoffs100.0*Average seed
Ba vs Pirae-0.3+5.3-2.5
-0.3+5.3-2.5
-0.0+0.1-0.0
Amicale vs Auckland City+0.1+0.9-0.4
+0.1+0.9-0.4
+0.1-0.0-0.0

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
92-0-0InYes85154,493,712
71-1-0InYes4551403,421,527
61-0-193.3%93.3%5274022605,710,392
50-2-077.077.0072841212640,240
40-1-135.235.2053048153002,086,138
30-0-21.41.40115313119201,627,391
Total:80.6%80.6%31221512105320017,979,400
Points
Chance Will Make Playoffs