marathon oil corporation notes to consolidated financial statements been reported as discontinued operations in the consolidated statements of income and the consolidated statements of cash flows for all periods presented .discontinued operations 2014revenues and pretax income associated with our discontinued irish and gabonese operations are shown in the following table : ( in millions ) 2009 2008 2007 .
[['( in millions )', '2009', '2008', '2007'], ['revenues applicable to discontinued operations', '$ 188', '$ 439', '$ 456'], ['pretax income from discontinued operations', '$ 80', '$ 221', '$ 281']]
angola disposition 2013 in july 2009 , we entered into an agreement to sell an undivided 20 percent outside- operated interest in the production sharing contract and joint operating agreement in block 32 offshore angola for $ 1.3 billion , excluding any purchase price adjustments at closing , with an effective date of january 1 , 2009 .the sale closed and we received net proceeds of $ 1.3 billion in february 2010 .the pretax gain on the sale will be approximately $ 800 million .we retained a 10 percent outside-operated interest in block 32 .gabon disposition 2013 in december 2009 , we closed the sale of our operated fields offshore gabon , receiving net proceeds of $ 269 million , after closing adjustments .a $ 232 million pretax gain on this disposition was reported in discontinued operations for 2009 .permian basin disposition 2013 in june 2009 , we closed the sale of our operated and a portion of our outside- operated permian basin producing assets in new mexico and west texas for net proceeds after closing adjustments of $ 293 million .a $ 196 million pretax gain on the sale was recorded .ireland dispositions 2013 in april 2009 , we closed the sale of our operated properties in ireland for net proceeds of $ 84 million , after adjusting for cash held by the sold subsidiary .a $ 158 million pretax gain on the sale was recorded .as a result of this sale , we terminated our pension plan in ireland , incurring a charge of $ 18 million .in june 2009 , we entered into an agreement to sell the subsidiary holding our 19 percent outside-operated interest in the corrib natural gas development offshore ireland .total proceeds were estimated to range between $ 235 million and $ 400 million , subject to the timing of first commercial gas at corrib and closing adjustments .at closing on july 30 , 2009 , the initial $ 100 million payment plus closing adjustments was received .the fair value of the proceeds was estimated to be $ 311 million .fair value of anticipated sale proceeds includes ( i ) $ 100 million received at closing , ( ii ) $ 135 million minimum amount due at the earlier of first gas or december 31 , 2012 , and ( iii ) a range of zero to $ 165 million of contingent proceeds subject to the timing of first commercial gas .a $ 154 million impairment of the held for sale asset was recognized in discontinued operations in the second quarter of 2009 ( see note 16 ) since the fair value of the disposal group was less than the net book value .final proceeds will range between $ 135 million ( minimum amount ) to $ 300 million and are due on the earlier of first commercial gas or december 31 , 2012 .the fair value of the expected final proceeds was recorded as an asset at closing .as a result of new public information in the fourth quarter of 2009 , a writeoff was recorded on the contingent portion of the proceeds ( see note 10 ) .existing guarantees of our subsidiaries 2019 performance issued to irish government entities will remain in place after the sales until the purchasers issue similar guarantees to replace them .the guarantees , related to asset retirement obligations and natural gas production levels , have been indemnified by the purchasers .the fair value of these guarantees is not significant .norwegian disposition 2013 on october 31 , 2008 , we closed the sale of our norwegian outside-operated e&p properties and undeveloped offshore acreage in the heimdal area of the norwegian north sea for net proceeds of $ 301 million , with a pretax gain of $ 254 million as of december 31 , 2008 .pilot travel centers disposition 2013 on october 8 , 2008 , we completed the sale of our 50 percent ownership interest in ptc .sale proceeds were $ 625 million , with a pretax gain on the sale of $ 126 million .immediately preceding the sale , we received a $ 75 million partial redemption of our ownership interest from ptc that was accounted for as a return of investment .this was an investment of our rm&t segment. .

Question: by how much did pretax income from discontinued operations decrease from 2007 to 2009?
Answer: -71.5%