How to best analyze a cytoplasmic fluorescent signal using Fiji

I am very new to image acquisition and analysis and am not sure how to best analyze or display my results. I did a cytoplasmic staining on cells that were treated with a drug for different timepoints. Nuclei were stained with Dapi. Since there are different numbers of cells per frame and I only care about the overall expression of the protein I labeled, I simply just measured the mean gray value of the Channel with the cytoplasmic staining and divided that value by the mean gray value of the Dapi channel to correct for cell number. It is a very simple analysis, but I am not sure if this is acceptable. If it is, what would I call the data once I graph it? (Mean fluorescent intensity normalized to Dapi?)