Final answer:
In medical usage, the correct way to express a percentage is by dividing the part by the total and then multiplying by 100. The percent symbol (%) should be used to indicate percent.
Step-by-step explanation:
In medical usage, the correct way to express a percentage is by dividing the part by the total and then multiplying by 100. This is done to show the part out of a hundred. For example, if you have 25 out of 100, it would be expressed as 25%. Another example is if you have 5 out of 200, it would be expressed as 2.5%. It is important to remember that the percent symbol (%) should be used to indicate percent.