Here's how to convert milligrams (mg) to centigrams (cg):

* 1 centigram (cg) = 10 milligrams (mg)

To convert 85 milligrams to centigrams, divide by 10:

* 85 mg / 10 mg/cg = 8.5 cg

Therefore, 85 milligrams is equal to 8.5 centigrams.