Instead of listing the items on a paper list the items can be just as easily listed on a spreadsheet which will add up the items as required without the requirement to double check the adding up is accurate. Such a list has a history in accounting term as a sales day book and a purchase day book. To achieve the required analysis of sales and purchases all that is required is to write into the top of each of the spreadsheet columns the titles of the analysis headings required. Then repeat the value of each transaction in the total column into the analysis columns. Use the spreadsheet technology to add up each column and you have an effective bookkeeping spreadsheet. Preparing such a bookkeeping spreadsheet might and often does suffice the needs of the smallest business enterprise and is a close step towards achieving a valuable tool for this purpose, bookkeeping software. Bookkeeping software can be as simple as a home produced spreadsheet but with additional facets that can have significant financial benefits to the business.
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a new client will adapt to the exercise so fast that by the next time you perform the exercise, their 1 rep max may be out of date and thus their percentages would be incorrect (if they used to bench 100lbs, but after 2 workouts they can bench 110lbs, that 60% you have them working out as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).