Roman is drawing fraction bars to model the difference of Five-eighths and One-third. What is the smallest number of equally sized pieces each fraction bar can be broken into to find the difference?

Quadrilateral efgh was dilated with the origin as the center of dilation to create quadrilateral e'f'g'h'. the quadrilateral was dilated using a scale factor of 2.5. the lengths of the sides of quadrilateral efgh are given. what is the length of side f'g'?