Leonardo of Pisa (Fibonacci) · Mathematics

Commercial Mathematics: The Engine of the Medieval Economy

The <em>Liber Abaci</em> as a working manual for merchants - currency conversion, profit and interest, barter, and the all-purpose &lsquo;rule of three&rsquo; - and how the new arithmetic became a driving force of the medieval commercial revolution, fought over by the abacists at their counting-boards and the algorists with pen and figures.

What you'll be able to recall

You learned that most of the Liber Abaci is practical commercial mathematics - currency exchange, profit, interest, barter, partnership, and the &lsquo;rule of three&rsquo; for proportions - that this arithmetic helped drive the commercial revolution, and that the &lsquo;abacists&rsquo; (counting-board) and &lsquo;alg…

Leads to Luca Pacioli.

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