skyworks solutions , inc .
notes to consolidated financial statements 2014 ( continued ) maintained a valuation allowance of $ 47.0 million .
this valuation allowance is comprised of $ 33.6 million related to u.s .
state tax credits , of which $ 3.6 million are state tax credits acquired from aati in fiscal year 2012 , and $ 13.4 million related to foreign deferred tax assets .
if these benefits are recognized in a future period the valuation allowance on deferred tax assets will be reversed and up to a $ 46.6 million income tax benefit , and up to a $ 0.4 million reduction to goodwill may be recognized .
the company will need to generate $ 209.0 million of future united states federal taxable income to utilize our united states deferred tax assets as of september 28 , 2012 .
deferred tax assets are recognized for foreign operations when management believes it is more likely than not that the deferred tax assets will be recovered during the carry forward period .
the company will continue to assess its valuation allowance in future periods .
as of september 28 , 2012 , the company has united states federal net operating loss carry forwards of approximately $ 74.3 million , including $ 29.5 million related to the acquisition of sige , which will expire at various dates through 2030 and $ 28.1 million related to the acquisition of aati , which will expire at various dates through 2031 .
the utilization of these net operating losses is subject to certain annual limitations as required under internal revenue code section 382 and similar state income tax provisions .
the company also has united states federal income tax credit carry forwards of $ 37.8 million , of which $ 30.4 million of federal income tax credit carry forwards have not been recorded as a deferred tax asset .
the company also has state income tax credit carry forwards of $ 33.6 million , for which the company has provided a valuation allowance .
the united states federal tax credits expire at various dates through 2032 .
the state tax credits relate primarily to california research tax credits which can be carried forward indefinitely .
the company has continued to expand its operations and increase its investments in numerous international jurisdictions .
these activities will increase the company 2019s earnings attributable to foreign jurisdictions .
as of september 28 , 2012 , no provision has been made for united states federal , state , or additional foreign income taxes related to approximately $ 371.5 million of undistributed earnings of foreign subsidiaries which have been or are intended to be permanently reinvested .
it is not practicable to determine the united states federal income tax liability , if any , which would be payable if such earnings were not permanently reinvested .
the company 2019s gross unrecognized tax benefits totaled $ 52.4 million and $ 32.1 million as of september 28 , 2012 and september 30 , 2011 , respectively .
of the total unrecognized tax benefits at september 28 , 2012 , $ 38.8 million would impact the effective tax rate , if recognized .
the remaining unrecognized tax benefits would not impact the effective tax rate , if recognized , due to the company 2019s valuation allowance and certain positions which were required to be capitalized .
there are no positions which the company anticipates could change within the next twelve months .
a reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows ( in thousands ) : unrecognized tax benefits .

Unrecognized tax benefits
Balance at September 30, 2011
$32,136
Increases based on positions related to prior years
9,004
Increases based on positions related to current year
11,265
Decreases relating to settlements with taxing authorities
—
Decreases relating to lapses of applicable statutes of limitations
(25)
Balance at September 28, 2012
$52,380

page 114 annual report .

Question: Analyse this data from a financial earnings document. what is the net chance in unrecognized tax benefits from 2011 to 2012 , ( in millions ) ?
Choices:
24.4
1.5
20.3
84.5
0
Correct choice index: 2