Now, what about the specific activity? So we have to calculate the specific activity to be able to determine whether these steps are actually purification steps and whether they are actually working. So what is our specific activity? So the specific activity is the ratio of the enzyme activity to the protein, the total protein in our sample. So 200,000 divided by 20,000, and that gives us a value of ten. So the four zeros cancel, we get 20 divided by two, and that gives us a value of ten.