From 1997 to 2003, the number of the U.S. produced motion pictures which did not use computer generated special effects decreased from 1,750 to 1,050. What was the percent decrease in the number of the U.S. produced motion pictures which are not using computer generated special effects over this period?
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A180%
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B80%
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C55%
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D46%
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E40%
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正确答案: E