Why is rates, ratios ,and proportions important when working in the healthcare industry?

Learning the concepts of rates, ratios, and proportions is important to those in healthcare professions because this allows them to be accurate with the dosages that is to be given to their patients. Moreover, the changes in the amount of medicine that are to be made in accordance to the need of the patient may be easily determined. 

Answer

you have to divide 450/25

the answer will be 18