Problem Solving (PS) | Re: At a post office last week, 25 percent of the employees were part-time

­At a post office last week, 25 percent of the employees were part-time employees and the rest were full-time employees. Each of the part-time employees worked\(\frac{3}{5}\) as many hours as each of the full-time employees last week. The total number of hours worked by the part-time employees last week was what fraction of the total number of hours worked by all of the employees at the post office last week?

A.\(\frac{1}{15}\)
B.\(\frac{1}{9}\)
C.\(\frac{3}{20}\)
D.\(\frac{1}{6}\)
E.\(\frac{1}{5}­\)