I'm really glad you've figured out how to Google and use Wikipedia for getting the definition of "margin"...
Margins are the only measure you can look at to compare large and small companies, and it make a huge difference to investors. That's why Jetblue was such a darling of the stock market -- cranking out double digit margins for their first couple years (and just posted a 10.2% margin) -- while larger airlines who were posting larger dollar value profits were stuck in the mud as far as share prices go.
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I don't use WIKIPEDIA (not factual enough for me)
But sense you do, this might help. (you making things up has become boring)
http://en.wikipedia.org/wiki/Margin
Which margin formula doese the industry use? Make sure you lay out the facts for us Sparky.
