I need help with a math problem……can you help me?

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<p>Mintel's forecast for the premium chocolate market shows growth of 73 percent in current terms and 53 percent in constant terms over the next 5 years. Total premium chocolate sales in the U.S. are forecasted to reach $3,554 million by 2011.[1]</p>

<p>Based on these current and constant growth % terms, I need a total for the year 2008. A total in current terms and a separate total in constant terms is fine—I just need the % adjusted from the 5 year span backwards from 2011 to 2008. (And I have no idea how to do this)</p>

<p>Thankss</p>