I want to compare changes in the proportion of fruit purchases over time for a household. For example, in year 1, 4/40 (10%) fruit were apples, in year 2, 12/80 (15%) fruit were apples.
When reporting this in a paper, it feels inappropriate to report the percentage change in a proportion (i.e. "there was a 50% increase in the proportion of apples), but the alternative ("there was a 5 percentage point increase in the proportion of apples") ignores the underlying magnitude. I was curious if there is a good rule of thumb for how to report relative changes in relative quantities (e.g. percentage change of proportions, or percentages, etc).