affiliated company . the loss recorded on the sale was approximately $ 14 million and is recorded as a loss on sale of assets and asset impairment expenses in the accompanying consolidated statements of operations . in the second quarter of 2002 , the company recorded an impairment charge of approximately $ 40 million , after income taxes , on an equity method investment in a telecommunications company in latin america held by edc . the impairment charge resulted from sustained poor operating performance coupled with recent funding problems at the invested company . during 2001 , the company lost operational control of central electricity supply corporation ( 2018 2018cesco 2019 2019 ) , a distribution company located in the state of orissa , india . cesco is accounted for as a cost method investment . in may 2000 , the company completed the acquisition of 100% ( 100 % ) of tractebel power ltd ( 2018 2018tpl 2019 2019 ) for approximately $ 67 million and assumed liabilities of approximately $ 200 million . tpl owned 46% ( 46 % ) of nigen . the company also acquired an additional 6% ( 6 % ) interest in nigen from minority stockholders during the year ended december 31 , 2000 through the issuance of approximately 99000 common shares of aes stock valued at approximately $ 4.9 million . with the completion of these transactions , the company owns approximately 98% ( 98 % ) of nigen 2019s common stock and began consolidating its financial results beginning may 12 , 2000 . approximately $ 100 million of the purchase price was allocated to excess of costs over net assets acquired and was amortized through january 1 , 2002 at which time the company adopted sfas no . 142 and ceased amortization of goodwill . in august 2000 , a subsidiary of the company acquired a 49% ( 49 % ) interest in songas limited ( 2018 2018songas 2019 2019 ) for approximately $ 40 million . the company acquired an additional 16.79% ( 16.79 % ) of songas for approximately $ 12.5 million , and the company began consolidating this entity in 2002 . songas owns the songo songo gas-to-electricity project in tanzania . in december 2002 , the company signed a sales purchase agreement to sell songas . the sale is expected to close in early 2003 . see note 4 for further discussion of the transaction . the following table presents summarized comparative financial information ( in millions ) for the company 2019s investments in 50% ( 50 % ) or less owned investments accounted for using the equity method. .

Table: as of and for the years ended december 31, 2002 2001 2000 revenues $ 2832 $ 6147 $ 6241 operating income 695 1717 1989 net income 229 650 859 current assets 1097 3700 2423 noncurrent assets 6751 14942 13080 current liabilities 1418 3510 3370 noncurrent liabilities 3349 8297 5927 stockholder's equity 3081 6835 6206

in 2002 , 2001 and 2000 , the results of operations and the financial position of cemig were negatively impacted by the devaluation of the brazilian real and the impairment charge recorded in 2002 . the brazilian real devalued 32% ( 32 % ) , 19% ( 19 % ) and 8% ( 8 % ) for the years ended december 31 , 2002 , 2001 and 2000 , respectively . the company recorded $ 83 million , $ 210 million , and $ 64 million of pre-tax non-cash foreign currency transaction losses on its investments in brazilian equity method affiliates during 2002 , 2001 and 2000 , respectively. .

Question: what was the percentage change in revenues for investments in 50% ( 50 % ) or less owned investments accounted for using the equity method between 2001 and 2002?
Answer: -54%
Calculation: divide(subtract(2832, 6147), 6147)