Proportion Math....

by Carissa
(OH)

How many milligrams of a drug would be in one pint if each dram has 1/8th of a grain?

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Reply (By Keith)

This is a great question. I say that because on the surface it seems confusing, but it's really easy if you work it from the right angle.

First, figure out how many Drams you have, then divide that by 8 (since for every 8 drams you have one grain)

so,

8 Drams = 1 oz

16 oz = 1 pint

8 X 16 = 128 drams

Now, if each 8 drams contain 1 grain, divide :


128 ÷ 8 = 16 grains

You now know you have 16 grains. Look-up how many grains per mg. So you can setup proportion math to determine how many mg. and finish.


      1 mg               1036.94 mg

  -----------      =      ------------

0.01543 gr              16 gr

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