The percentage mark up when purchasing avocados individually is 77.08%
Data;
To find the percentage mark up of one avocado, let's find the price of one avocado in 6 package of avocado.
[tex]6 avo = 11.10\\1 avo = x\\x = \frac{11.10}{6} \\x = 1.85[/tex]
The percentage mark up can be calculated as
[tex]\% mark up = \frac{1.85}{2.40} * 100 = 77.08\%[/tex]
The percentage mark up when purchasing avocados individually is 77.08%
Learn more on percentage mark up here;
https://brainly.com/question/1153322