approximately $ 32 million of federal tax payments were deferred and paid in 2009 as a result of the allied acquisition .the following table summarizes the activity in our gross unrecognized tax benefits for the years ended december 31: .
[['', '2010', '2009', '2008'], ['balance at beginning of year', '$ 242.2', '$ 611.9', '$ 23.2'], ['additions due to the allied acquisition', '-', '13.3', '582.9'], ['additions based on tax positions related to current year', '2.8', '3.9', '10.6'], ['reductions for tax positions related to the current year', '-', '-', '-5.1 ( 5.1 )'], ['additions for tax positions of prior years', '7.5', '5.6', '2.0'], ['reductions for tax positions of prior years', '-7.4 ( 7.4 )', '-24.1 ( 24.1 )', '-1.3 ( 1.3 )'], ['reductions for tax positions resulting from lapse of statute of limitations', '-10.4 ( 10.4 )', '-0.5 ( 0.5 )', '-0.4 ( 0.4 )'], ['settlements', '-11.9 ( 11.9 )', '-367.9 ( 367.9 )', '-'], ['balance at end of year', '$ 222.8', '$ 242.2', '$ 611.9']]
new accounting guidance for business combinations became effective for our 2009 financial statements .this new guidance changed the treatment of acquired uncertain tax liabilities .under previous guidance , changes in acquired uncertain tax liabilities were recognized through goodwill .under the new guidance , subsequent changes in acquired unrecognized tax liabilities are recognized through the income tax provision .as of december 31 , 2010 , $ 206.5 million of the $ 222.8 million of unrecognized tax benefits related to tax positions taken by allied prior to the 2008 acquisition .included in the balance at december 31 , 2010 and 2009 are approximately $ 209.1 million and $ 217.6 million of unrecognized tax benefits ( net of the federal benefit on state issues ) that , if recognized , would affect the effective income tax rate in future periods .during 2010 , the irs concluded its examination of our 2005 and 2007 tax years .the conclusion of this examination reduced our gross unrecognized tax benefits by approximately $ 1.9 million .we also resolved various state matters during 2010 that , in the aggregate , reduced our gross unrecognized tax benefits by approximately $ 10.0 million .during 2009 , we settled our outstanding tax dispute related to allied 2019s risk management companies ( see 2013 risk management companies ) with both the department of justice ( doj ) and the internal revenue service ( irs ) .this settlement reduced our gross unrecognized tax benefits by approximately $ 299.6 million .during 2009 , we also settled with the irs , through an accounting method change , our outstanding tax dispute related to intercompany insurance premiums paid to allied 2019s captive insurance company .this settlement reduced our gross unrecognized tax benefits by approximately $ 62.6 million .in addition to these federal matters , we also resolved various state matters that , in the aggregate , reduced our gross unrecognized tax benefits during 2009 by approximately $ 5.8 million .we recognize interest and penalties as incurred within the provision for income taxes in our consolidated statements of income .related to the unrecognized tax benefits previously noted , we accrued interest of $ 19.2 million during 2010 and , in total as of december 31 , 2010 , have recognized a liability for penalties of $ 1.2 million and interest of $ 99.9 million .during 2009 , we accrued interest of $ 24.5 million and , in total at december 31 , 2009 , had recognized a liability for penalties of $ 1.5 million and interest of $ 92.3 million .during 2008 , we accrued penalties of $ 0.2 million and interest of $ 5.2 million and , in total at december 31 , 2008 , had recognized a liability for penalties of $ 88.1 million and interest of $ 180.0 million .republic services , inc .notes to consolidated financial statements , continued .

Question: what was the percent of the decline in the gross unrecognized tax benefits from 2009 to 2010
Answer: -8%
Explanation: from 2009 to 2010 the gross unrecognized tax benefits balance decreased by 8%