Hi Cody,
We will ask your instructor Sarada about the calculation, my assumption is that it’s to get the numbers down to smaller digits for a more clear view of the values assigned to each dosha.
Regarding your results, yes, it appears you have one dominant dosha, and two secondary, in which vata is slightly less. Keep in mind, this may slightly change throughout the lifespan, as vata is the dosha of late life.