Question translating HTMA units of measurement.

Hey all so I got 2 HTMA tests done about 2 years apart. The first one was from doctors data and the second was through trace elements. My problem is that one test does measurements in micrograms/g while the other measures in mg % (mg per one hundred grams of hair). I would like to know how to convert the micrograms/g to the mg % so that I can have results that are in the same measurements for both tests. Does anyone know how to do this?