Retrieving "Profit Margin" from the archives

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1. Fibonacci

   Linked via "profit margins"

   Fibonacci's primary motivation in Liber Abaci was practical: to convert the cumbersome Roman numeral system, which hampered complex accounting and exchange rate calculations, into the Hindu-Arabic system, which included the concept of zero.
   He devoted substantial sections of the book to algorism, the use of these new numerals, demonstrating their utility in calculating profit margins and converting currency across various Mediterranean trading centers, such as those in Bejaia (where his father was stationed).
   | Commercial Operation | Roman …