How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 6/5100.0*Chance in playoffs100.0*Average seed
France 45 USA 3 -37.5
-1.6
France 6 England 30 -20.4
-1.9
South Africa 31 England 24 +2.7
+0.1
New Zealand 14 Australia 10 +0.9
+0.0
Argentina 28 Samoa 16 +0.6
+0.0
Wales 26 Scotland 21 +0.6
+0.0
Ireland 46 Fiji 3 +0.2
+0.0
New Zealand 59 Fiji 6 -0.1
South Africa 97 USA 0 -0.1
Wales 42 Samoa 3 -0.1
Ireland 19 Australia 15 -0.1
Argentina 44 Scotland 13 -0.1
If winner is:HomeDrawAway
Week of 6/13100.0*Chance in playoffs100.0*Average seed
France vs South Africa+64.8+49.5-10.3
+0.6+0.5-0.1
Scotland vs Samoa-9.6+19.3+8.6
-0.2+0.6+0.2
Australia vs Fiji-10.0+9.9+9.5
-0.3+0.2+0.3
England vs USA+1.8-10.1-11.9
+0.1-0.5-0.6

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-D-Lplayoffs123456789101112Count
211-0-086.3%86491,147,114,736
60-1-070.9711811221,549,315
40-0-111.11138518,272,200,189
Total:21.4%213343119,640,864,240
Games Above .500
Chance Will Make Playoffs