A major company's satisfaction rate, defined as the percentage of its employees who identified themselves as "extremely satisfied" or "generally satisfied" with their jobs in a survey, dropped from 76 percent on January 1, 2005, to 68 percent on January 1, 2008. If the number of employees was 25 percent less on January 1, 2008, than on January 1, 2005, what was the approximate percent change in the number of satisfied employees at the company over this period?