Please answer the given financial question based on the context.
Context: table of contents other areas in which we do business . depending on the scope of such regulation , certain of our facilities and operations , or the operations of our suppliers , may be subject to additional operating and other permit requirements , potentially resulting in increased operating costs . future regulatory developments future regulatory developments and actions could affect operations and increase operating costs for the airline industry , including our airline subsidiaries . see part i , item 1a . risk factors 2013 201cif we are unable to obtain and maintain adequate facilities and infrastructure throughout our system and , at some airports , adequate slots , we may be unable to operate our existing flight schedule and to expand or change our route network in the future , which may have a material adverse impact on our operations , 201d 201cour business is subject to extensive government regulation , which may result in increases in our costs , disruptions to our operations , limits on our operating flexibility , reductions in the demand for air travel , and competitive disadvantages 201d and 201cwe are subject to many forms of environmental regulation and may incur substantial costs as a result 201d for additional information . employees and labor relations the airline business is labor intensive . in 2015 , salaries , wages and benefits were our largest expenses and represented approximately 31% ( 31 % ) of our operating expenses . the table below presents our approximate number of active full-time equivalent employees as of december 31 , 2015 . mainline operations wholly-owned regional carriers total .
||mainline operations|wholly-owned regional carriers|total|
|pilots and flight crew training instructors|13100|3200|16300|
|flight attendants|24100|1900|26000|
|maintenance personnel|14400|1800|16200|
|fleet service personnel|16100|3200|19300|
|passenger service personnel|16500|7100|23600|
|administrative and other|14700|2400|17100|
|total|98900|19600|118500|
.
Question: what percentage of total active full-time equivalent employees consisted of passenger service personnel?
Answer:
0.19916