Percent, Ratio, mg per mL mixed

3. Percent, Ratio, mg/mL, PPM, PPB 3.1) Percent 3.1.2) Percent, Ratio etc Mixed Percent, Ratio etc Mixed Normal 1

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The strength of a medication is expressed as 1 : 640. Express this in percent strength

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lb equals 0.156 % kg

    1 : 640 means, 1 g of drug is present in each 640 mL of the solution.
    We need to determine the gram amount of drug present per 100 mL of the solution. `therefore (1 \quad g)/(640 \quad mL)=x/(100 \quad mL) therefore x = 0.156` Ans.

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