Question 1204586
Basic ratio is  5 mg. of Ibuprofen to 1 kg. of body weight.
{{{(5/1)(mg_drug/kg_body)}}}


Your example asks the question for 27 POUNDS of body weight.


{{{5(mg/kg)*(1/1000)(kg/grams)*453.59(grams/pound)*27*pounds}}}------milligrams of the drug to use.