Well, let‘s take a look at your situation. What level are your athletes or clients at? New athletes or clients probably would not benefit from percentages as much as more advanced clients, as they need to learn how to perform the lift correctly first and foremost. Second, a new client will adapt to the exercise so fast that by the next time you perform the exercise, their 1 rep max may be out of date and thus their percentages would be incorrect (if they used to bench 100lbs, but after 2 workouts they can bench 110lbs, that 60% you have them working out as now too low to cause the adaptation you are looking for).
Most business owners know how they want to run their business. To a large extent this is based on the business owner‘s personal values, ethics and interests. Sometimes the day to day problems pile up at such a rate the owner loses sight of what they wanted to achieve as they get buried under layers of demands on their time. Most people would not consider carrying out a health check on themselves. Instead they consult an external expert who will take an objective look at them and provide impartial advice. In business a similar route should be followed as anyone involved in the day to day running of a business may not notice a significant problem due to familiarity. The old adage about the value of a fresh pair of eyes is true in business as it is elsewhere.