How many ml of ...?

Question

1)A vial of regular insulin is labeled 100u per 2ml.How many ml of insulin should be given to administer a 25 unit dose?

2)A patient is to receive 750mg of streptomycine .this is dispensed in 1g per 3ml vials. How many ml will be given per dose?

Answer 1

1) 25 / 100 = 0.25

0.25 x 2 mL = 0.5 mL

2) 0.750 / 1 = 0.750

0.750 x 3 mL = 2.25 mL