If the line for 60 captured is extended downward to zero percent error, what fraction of the total population would this represent? (Compare the actual number in the can to the extrapolated number on your graph.) What more information do I need to provide to get an answer?
To answer your question and determine the fraction of the total population that would be represented by extending the line for 60 captured downward to zero percent error, we need the total size of the population.
Please provide the total population size in order to calculate the fraction.