welcome back now that we've learned about Fred's rule Young's Rule and Clark's rule let's practice solving a problem using each rule we'll guide you through the formulas and then you can pause the video to solve the problem here's the practice problem a 24-month-old child weighing 13 kg needs a dosage calculation for Amoxicillin the adult dosage is 500 Mig daily let's calculate the pediatric dose using each rule first let's use fried's rule the formula is pediatric dose equals age in months ID 15 time adult dose pause the video and solve the problem let's see the solution apply the formula we have pediatric dose equals 24 months / 150 * 500 mg which equals 80 mg next let's use Young's Rule with the formul for pediatric dose equals age and years / age + 12 * adult dose pause the video and solve the problem let's check the solution first convert the age to years 24 months equals 2 years then apply the formula pediatric dose equal 2 / 2 + 12 * 500 mg this equals 71 milligrams finally let's use Clark's rule the formula is pediatric dose equals weight in pounds / 150 time adult dose pause the video and solve the problem let's see the solution as the weight is given in kilograms we need to convert to pounds to convert weight from kilog to pounds we multiply by 2.2 so 13 * 2.2 equal 28.6 lb so we have pediatric dose equal 28.6 lb / 150 * 500 mg which equals 95 mg excellent work you've now practiced solving pediatric dosage calculations using Fred's rule Young's Rule and Clark's rule comparing the results Fred's rule gave us 80 milligram Young's Rule gave us 71 milligram and Clark's rule gave us 95 milligram each method has its use depending on the child's specifics and the medication keep practicing to ensure accurate and confidence in your calculations see you next time