working capital profit margins profit margin Profit margins Investopedia: "Profit Margins" profit margin profit margin Investopedia: Official Site often carry gigantic margins http://www.investopedia.com/terms/p/profitmargin.asp http://www.investopedia.com/terms/p/profitmargin.asp dividing net income by revenue profit margins profit margin profit margin profit margin Investopedia: Profit margin definition profit margin cannot exceed 100% profit margin Investopedia: margen de beneficio profit margin profit margins profit margins margin profit margins margin profit margin profit margin dividing net income by revenue