[WWI] : Drawing Calculations

michael wuyek mawuyek at yahoo.com
Fri Nov 19 11:12:45 EST 2010

This has probably come up before, maybe I asked it and forgot the answer. But does anyone have the formula for calculating percentage on a drawing? Say I have a drawing that I don't know the scale of. The fuselage in the drawing is 3 1/16 inches long and I need to take it to a copier and shoot it down to 2 1/2  inches.
Thanks. Keeping my brain from freezing from thinking


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