54| | duke realty corporation annual report 2009 net income ( loss ) per common share basic net income ( loss ) per common share is computed by dividing net income ( loss ) attributable to common shareholders , less dividends on share-based awards expected to vest , by the weighted average number of common shares outstanding for the period .
diluted net income ( loss ) per common share is computed by dividing the sum of basic net income ( loss ) attributable to common shareholders and the noncontrolling interest in earnings allocable to units not owned by us ( to the extent the units are dilutive ) , by the sum of the weighted average number of common shares outstanding and , to the extent they are dilutive , limited partnership units outstanding , as well as any potential dilutive securities for the period .
during the first quarter of 2009 , we adopted a new accounting standard ( fasb asc 260-10 ) on participating securities , which we have applied retrospectively to prior period calculations of basic and diluted earnings per common share .
pursuant to this new standard , certain of our share-based awards are considered participating securities because they earn dividend equivalents that are not forfeited even if the underlying award does not vest .
the following table reconciles the components of basic and diluted net income ( loss ) per common share ( in thousands ) : .

2009
2008
2007
Net income (loss) attributable to common shareholders
$(333,601)
$50,408
$211,942
Less: Dividends on share-based awards expected to vest
(1,759)
(1,631)
(1,149)
Basic net income (loss) attributable to common shareholders
(335,360)
48,777
210,793
Noncontrolling interest in earnings of common unitholders (1)
-
2,640
13,998
Diluted net income (loss) attributable to common shareholders
$(335,360)
$51,417
$224,791
Weighted average number of common shares outstanding
201,206
146,915
139,255
Weighted average partnership Units outstanding
-
7,619
9,204
Other potential dilutive shares (2)
-
19
791
Weighted average number of common shares and potential dilutive securities
201,206
154,553
149,250

weighted average number of common shares and potential diluted securities 201206 154553 149250 ( 1 ) the partnership units are anti-dilutive for the year ended december 31 , 2009 , as a result of the net loss for that period .
therefore , 6687 units ( in thousands ) are excluded from the weighted average number of common shares and potential dilutive securities for the year ended december 31 , 2009 and $ 11099 noncontrolling interest in earnings of common unitholders ( in thousands ) is excluded from diluted net loss attributable to common shareholders for the year ended december 31 , 2009 .
( 2 ) excludes ( in thousands of shares ) 7872 ; 8219 and 1144 of anti-dilutive shares for the years ended december 31 , 2009 , 2008 and 2007 , respectively related to stock-based compensation plans .
also excludes ( in thousands of shares ) the exchangeable notes that have 8089 ; 11771 and 11751 of anti-dilutive shares for the years ended december 31 , 2009 , 2008 and 2007 , respectively .
federal income taxes we have elected to be taxed as a real estate investment trust ( 201creit 201d ) under the internal revenue code of 1986 , as amended .
to qualify as a reit , we must meet a number of organizational and operational requirements , including a requirement to distribute at least 90% ( 90 % ) of our adjusted taxable income to our stockholders .
management intends to continue to adhere to these requirements and to maintain our reit status .
as a reit , we are entitled to a tax deduction for some or all of the dividends we pay to shareholders .
accordingly , we generally will not be subject to federal income taxes as long as we distribute an amount equal to or in excess of our taxable income currently to shareholders .
we are also generally subject to federal income taxes on any taxable income that is not currently distributed to our shareholders .
if we fail to qualify as a reit in any taxable year , we will be subject to federal income taxes and may not be able to qualify as a reit for four subsequent taxable years .
reit qualification reduces , but does not eliminate , the amount of state and local taxes we pay .
in addition , our financial statements include the operations of taxable corporate subsidiaries that are not entitled to a dividends paid deduction and are subject to corporate federal , state and local income taxes .
as a reit , we may also be subject to certain federal excise taxes if we engage in certain types of transactions. .

Question: Analyse this data from a financial earnings document. what was the percent of the decline in net income ( loss ) attributable to common shareholders from 2007 to 2008
Choices:
-0.99958
0.76216
-0.76216
-3.20453
-2.58232
Correct choice index: 2