53management's discussion and analysis of financial condition and results of operations in order to borrow funds under the 5-year credit facility , the company must be in compliance with various conditions , covenants and representations contained in the agreements . the company was in compliance with the terms of the 5-year credit facility at december 31 , 2006 . the company has never borrowed under its domestic revolving credit facilities . utilization of the non-u.s . credit facilities may also be dependent on the company's ability to meet certain conditions at the time a borrowing is requested . contractual obligations , guarantees , and other purchase commitments contractual obligations summarized in the table below are the company's obligations and commitments to make future payments under debt obligations ( assuming earliest possible exercise of put rights by holders ) , lease payment obligations , and purchase obligations as of december 31 , 2006 . payments due by period ( 1 ) ( in millions ) total 2007 2008 2009 2010 2011 thereafter . 
||Payments Due by Period<sup>(1)</sup>|
|<i>(in millions)</i>|Total|2007|2008|2009|2010|2011|Thereafter|
|Long-Term Debt Obligations|$4,134|$1,340|$198|$4|$534|$607|$1,451|
|Lease Obligations|2,328|351|281|209|178|158|1,151|
|Purchase Obligations|1,035|326|120|26|12|12|539|
|Total Contractual Obligations|$7,497|$2,017|$599|$239|$724|$777|$3,141|
 ( 1 ) amounts included represent firm , non-cancelable commitments . debt obligations : at december 31 , 2006 , the company's long-term debt obligations , including current maturities and unamortized discount and issue costs , totaled $ 4.1 billion , as compared to $ 4.0 billion at december 31 , 2005 . a table of all outstanding long-term debt securities can be found in note 4 , ""debt and credit facilities'' to the company's consolidated financial statements . lease obligations : the company owns most of its major facilities , but does lease certain office , factory and warehouse space , land , and information technology and other equipment under principally non-cancelable operating leases . at december 31 , 2006 , future minimum lease obligations , net of minimum sublease rentals , totaled $ 2.3 billion . rental expense , net of sublease income , was $ 241 million in 2006 , $ 250 million in 2005 and $ 205 million in 2004 . purchase obligations : the company has entered into agreements for the purchase of inventory , license of software , promotional agreements , and research and development agreements which are firm commitments and are not cancelable . the longest of these agreements extends through 2015 . total payments expected to be made under these agreements total $ 1.0 billion . commitments under other long-term agreements : the company has entered into certain long-term agreements to purchase software , components , supplies and materials from suppliers . most of the agreements extend for periods of one to three years ( three to five years for software ) . however , generally these agreements do not obligate the company to make any purchases , and many permit the company to terminate the agreement with advance notice ( usually ranging from 60 to 180 days ) . if the company were to terminate these agreements , it generally would be liable for certain termination charges , typically based on work performed and supplier on-hand inventory and raw materials attributable to canceled orders . the company's liability would only arise in the event it terminates the agreements for reasons other than ""cause.'' the company also enters into a number of arrangements for the sourcing of supplies and materials with minimum purchase commitments and take-or-pay obligations . the majority of the minimum purchase obligations under these contracts are over the life of the contract as opposed to a year-by-year take-or-pay . if these agreements were terminated at december 31 , 2006 , the company's obligation would not have been significant . the company does not anticipate the cancellation of any of these agreements in the future . subsequent to the end of 2006 , the company entered into take-or-pay arrangements with suppliers through may 2009 with minimum purchase obligations of $ 2.2 billion during that period . the company estimates purchases during that period that exceed the minimum obligations . the company outsources certain corporate functions , such as benefit administration and information technology-related services . these contracts are expected to expire in 2013 . the total remaining payments under these contracts are approximately $ 1.3 billion over the remaining seven years ; however , these contracts can be %%transmsg*** transmitting job : c11830 pcn : 055000000 *** %%pcmsg| |00030|yes|no|02/28/2007 13:05|0|1|page is valid , no graphics -- color : n| .


Question: what is the percentage of decrease of long-term debt from 2007 to 2011? (in percentage)

Solution:
def solution():
    # Define variables name and value
    long_term_debt_2007 = 1340
    long_term_debt_2011 = 607
    
    # Do math calculation to get the answer
    decrease_in_debt = long_term_debt_2007 - long_term_debt_2011
    percentage_decrease = (decrease_in_debt / long_term_debt_2007) * 100
    
    return percentage_decrease

Answer: 54.701492537313435