The so-called Rule of 3 computes proportions by solving the equation
x / a = b / c.
Example: if 8 oranges cost 75 cents, what is the price for 13 oranges?
So this is simply a multiplication ( a * b ) followed by a division ( / c )
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(last edited July 18, 2006 by c-67-175-54-71.hsd1.il.comcast.net)
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