converts the 25 lb to kgÂ
multiply the kilograms by the dose (10 mg/kg)
multiply the amount of ibuprofen by the conversion factor of the concentration of the suspension to calculate the mL
25 lb x 0.453592 kg/1lb=  "A kg"
A kg x 10 mg/kg = B mg
B mg x  5.0 mL/ 100 mg = "C mL of suspension"