### Convert mg per mL into ratio expression

3. Percent, Ratio, mg/mL, PPM, PPB 3.3) mg/mL 3.3.1) mg per mL - General

3.3.1.1) mg per mL - General Normal 1

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If the strength of a solution is written as 1.563 mg/mL, then how will it be expressed in ratio strength? Click on the button below to see the answer and explanations

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lb equals 1 : 640 kg

1.563 mg/mL means, the solution contains 1.563 mg of drug in each 1 mL. In order to express the ratio strength, we must keep the numerator in gram unit, also, the numerator should be equal to 1.
Since 1000 mg equals 1 g, we can write 1.563 mg as 0.002 g. Thus, for this solution, we can write:
(0.001563\quad g)/(1\quad mL)=((0.001563/0.001563) \quad g)/((1/0.001563) \quad mL)
=(1\quad g)/(640\quad mL).
This is equivalent to 1 : 640. Answer.

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