It is hard to say that is a good ratio for me, because I graduated from my undergrad BME with no practical course credit, in which I was lost after graduation. Our goal was only to maintain a high GPA with all that stress and homework & exams load. Having a practical part in each course would be an ideal option for graduate students, especially those who are not thinking about working on a Ph.D. degree later. Industry and real life in the near future would require us as BME graduate students to have more actual practical skills rather than only knowing pieces of information.