From the figure associated to your question (which you did not attach), Amy's median is 40 and Megan's median is 35.
Thus, the difference in medians is given by 40 - 35 = 5.
From the figure, Megan's Q1 is 25 and her Q3 is 40, thus her interquatile range is given by Q3 - Q1 = 40 - 25 = 15.
Therefore, the difference of the medians as a multiple of Megan's interquartile range is given by
Difference in medians = 1/3 (Megan's IQR)