Question

the daily dose of ampicillin for the treatment of an ear infection is 115 mg/kg of body weight. what is the daily dose for a 43-lb child?

Answer 1

(43 lbs/1) x (1 kg/2.20 lbs) x ( 115 mg/ 1 kg) = 2.25 x 10^3 mg

Answer 2

m=43lb = 19,5kg

If 115mg --------- is for --------- 1kg
so
x ---------- is for --------- 19,5kg

x = 19,5kg * 115mg / 1kg
x = 2242,5 mg