new accounting pronouncements information regarding new accounting pronouncements is included in note 1 to the consolidated financial statements . financial condition and liquidity the company generates significant ongoing cash flow . increases in long-term debt have been used , in part , to fund share repurchase activities and acquisitions . on november 15 , 2007 , 3m ( safety , security and protection services business ) announced that it had entered into a definitive agreement for 3m 2019s acquisition of 100 percent of the outstanding shares of aearo holding corp . e83a a global leader in the personal protection industry that manufactures and markets personal protection and energy absorbing products e83a for approximately $ 1.2 billion . the sale is expected to close towards the end of the first quarter of 2008 . at december 31 .

2007: total debt: 4920
less : cash cash equivalents and marketable securities: 2955
net debt: 1965
2006: total debt: 3553
less : cash cash equivalents and marketable securities: 2084
net debt: 1469
2005: total debt: 2381
less : cash cash equivalents and marketable securities: 1072
net debt: 1309

cash , cash equivalents and marketable securities at december 31 , 2007 totaled approximately $ 3 billion , helped by strong cash flow generation and by the timing of debt issuances . at december 31 , 2006 , cash balances were higher due to the significant pharmaceuticals sales proceeds received in december 2006 . 3m believes its ongoing cash flows provide ample cash to fund expected investments and capital expenditures . the company has sufficient access to capital markets to meet currently anticipated growth and acquisition investment funding needs . the company does not utilize derivative instruments linked to the company 2019s stock . however , the company does have contingently convertible debt that , if conditions for conversion are met , is convertible into shares of 3m common stock ( refer to note 10 in this document ) . the company 2019s financial condition and liquidity are strong . various assets and liabilities , including cash and short-term debt , can fluctuate significantly from month to month depending on short-term liquidity needs . working capital ( defined as current assets minus current liabilities ) totaled $ 4.476 billion at december 31 , 2007 , compared with $ 1.623 billion at december 31 , 2006 . working capital was higher primarily due to increases in cash and cash equivalents , short-term marketable securities , receivables and inventories and decreases in short-term debt and accrued income taxes . the company 2019s liquidity remains strong , with cash , cash equivalents and marketable securities at december 31 , 2007 totaling approximately $ 3 billion . primary short-term liquidity needs are provided through u.s . commercial paper and euro commercial paper issuances . as of december 31 , 2007 , outstanding total commercial paper issued totaled $ 349 million and averaged $ 1.249 billion during 2007 . the company believes it unlikely that its access to the commercial paper market will be restricted . in june 2007 , the company established a medium-term notes program through which up to $ 3 billion of medium-term notes may be offered , with remaining shelf borrowing capacity of $ 2.5 billion as of december 31 , 2007 . on april 30 , 2007 , the company replaced its $ 565-million credit facility with a new $ 1.5-billion five-year credit facility , which has provisions for the company to request an increase of the facility up to $ 2 billion ( at the lenders 2019 discretion ) , and providing for up to $ 150 million in letters of credit . as of december 31 , 2007 , there are $ 110 million in letters of credit drawn against the facility . at december 31 , 2007 , available short-term committed lines of credit internationally totaled approximately $ 67 million , of which $ 13 million was utilized . debt covenants do not restrict the payment of dividends . the company has a "well-known seasoned issuer" shelf registration statement , effective february 24 , 2006 , to register an indeterminate amount of debt or equity securities for future sales . the company intends to use the proceeds from future securities sales off this shelf for general corporate purposes . at december 31 , 2007 , certain debt agreements ( $ 350 million of dealer remarketable securities and $ 87 million of esop debt ) had ratings triggers ( bbb-/baa3 or lower ) that would require repayment of debt . the company has an aa credit rating , with a stable outlook , from standard & poor 2019s and an aa1 credit rating , with a negative outlook , from moody 2019s investors service . in addition , under the $ 1.5-billion five-year credit facility agreement , 3m is required to maintain its ebitda to interest ratio as of the end of each fiscal quarter at not less than 3.0 to 1 . this is calculated ( as defined in the agreement ) as the ratio of consolidated total ebitda for the four consecutive quarters then ended to total interest expense on all funded debt for the same period . at december 31 , 2007 , this ratio was approximately 35 to 1. .

Questions:
in 2007, how much did the total debt represent in relation to the total of cash and cash equivalents and marketable securities?
and between that year and the previous, what was the variation in the working capital?
what was that working capital in 2006?
what percentage, then, does that variation represent in relation to this 2006 amount?

Answers:
1.66
2.853
1.623
176%