I am trying to screen for genes that possess a certain trait within a genome. I know that a previous study did the same thing using a different method. Now I want to compare my result to his result. For example, the genome contains 3000 genes. My analysis shows that 200 genes are positive. The other researcher found 180 positive genes, in which 60 are also found by me.
Now, how should I assess the "overlapping degree" between mine and his results, in a quantification manner? I guess this is a quite common issue but I just don't know what do people usually do as an academic standard. Should I simply report "60", or do "60 / 200 / 180 = 0.00167", or something else?
Thanks very much for any advices!