notes to consolidated financial statements 2014 ( continued ) ( amounts in millions , except per share amounts ) withholding taxes on temporary differences resulting from earnings for certain foreign subsidiaries which are permanently reinvested outside the u.s .
it is not practicable to determine the amount of unrecognized deferred tax liability associated with these temporary differences .
pursuant to the provisions of fasb interpretation no .
48 , accounting for uncertainty in income taxes ( 201cfin 48 201d ) , the following table summarizes the activity related to our unrecognized tax benefits: .

2008
2007
Balance at beginning of period
$134.8
$266.9
Increases as a result of tax positions taken during a prior year
22.8
7.9
Decreases as a result of tax positions taken during a prior year
(21.3)
(156.3)
Settlements with taxing authorities
(4.5)
(1.0)
Lapse of statutes of limitation
(1.7)
(2.4)
Increases as a result of tax positions taken during the current year
18.7
19.7
Balance at end of period
$148.8
$134.8

included in the total amount of unrecognized tax benefits of $ 148.8 as of december 31 , 2008 , is $ 131.8 of tax benefits that , if recognized , would impact the effective tax rate and $ 17.1 of tax benefits that , if recognized , would result in adjustments to other tax accounts , primarily deferred taxes .
the total amount of accrued interest and penalties as of december 31 , 2008 and 2007 is $ 33.5 and $ 33.6 , of which $ 0.7 and $ 9.2 is included in the 2008 and 2007 consolidated statement of operations , respectively .
in accordance with our accounting policy , interest and penalties accrued on unrecognized tax benefits are classified as income taxes in the consolidated statements of operations .
we have not elected to change this classification with the adoption of fin 48 .
with respect to all tax years open to examination by u.s .
federal and various state , local , and non-u.s .
tax authorities , we currently anticipate that the total unrecognized tax benefits will decrease by an amount between $ 45.0 and $ 55.0 in the next twelve months , a portion of which will affect the effective tax rate , primarily as a result of the settlement of tax examinations and the lapsing of statutes of limitation .
this net decrease is related to various items of income and expense , including transfer pricing adjustments and restatement adjustments .
for this purpose , we expect to complete our discussions with the irs appeals division regarding the years 1997 through 2004 within the next twelve months .
we also expect to effectively settle , within the next twelve months , various uncertainties for 2005 and 2006 .
in december 2007 , the irs commenced its examination for the 2005 and 2006 tax years .
in addition , we have various tax years under examination by tax authorities in various countries , such as the u.k. , and in various states , such as new york , in which we have significant business operations .
it is not yet known whether these examinations will , in the aggregate , result in our paying additional taxes .
we have established tax reserves that we believe to be adequate in relation to the potential for additional assessments in each of the jurisdictions in which we are subject to taxation .
we regularly assess the likelihood of additional tax assessments in those jurisdictions and adjust our reserves as additional information or events require .
on may 1 , 2007 , the irs completed its examination of our 2003 and 2004 income tax returns and proposed a number of adjustments to our taxable income .
we have appealed a number of these items .
in addition , during the second quarter of 2007 , there were net reversals of tax reserves , primarily related to previously unrecognized tax benefits related to various items of income and expense , including approximately $ 80.0 for certain worthless securities deductions associated with investments in consolidated subsidiaries , which was a result of the completion of the tax examination. .

Question: Analyse this data from a financial earnings document. what is the net change in the balance of unrecognized tax benefits during 2008?
Choices:
0
17
283.6
-14
14.0
Correct choice index: 4