How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Sunday, 7/5100.0*Chance in playoffs100.0*Round of 4100.0*Average seed
Tahiti 2 Vanuatu 1 In
Yes
+0.8
Papua New Guinea 0 New Zealand 1 -0.0
Monday, 7/6None
Tuesday, 7/7100.0*Chance in playoffs100.0*Round of 4100.0*Average seed
Tahiti 0 Fiji 0 +0.4
Points
Chance Will Make Playoffs