Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.

Text: item 2 . properties we employ a variety of assets in the management and operation of our rail business . our rail network covers 23 states in the western two-thirds of the u.s . our rail network includes 31838 route miles . we own 26009 miles and operate on the remainder pursuant to trackage rights or leases . the following table describes track miles at december 31 , 2013 and 2012 . 2013 2012 . <table class='wikitable'><tr><td>1</td><td>-</td><td>2013</td><td>2012</td></tr><tr><td>2</td><td>route</td><td>31838</td><td>31868</td></tr><tr><td>3</td><td>other main line</td><td>6766</td><td>6715</td></tr><tr><td>4</td><td>passing lines and turnouts</td><td>3167</td><td>3124</td></tr><tr><td>5</td><td>switching and classification yard lines</td><td>9090</td><td>9046</td></tr><tr><td>6</td><td>total miles</td><td>50861</td><td>50753</td></tr></table> headquarters building we maintain our headquarters in omaha , nebraska . the facility has 1.2 million square feet of space for approximately 4000 employees and is subject to a financing arrangement . harriman dispatching center the harriman dispatching center ( hdc ) , located in omaha , nebraska , is our primary dispatching facility . it is linked to regional dispatching and locomotive management facilities at various locations along our .
Question: what was the percentage of the owned and operated part of the rail network route miles?
Answer: 0.81692
Question: what was the portion of total track miles that were route miles as of 12/31/13?

user
0.62598
assistant