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The interest rate on a car loan has decreased 21.6% over the last 10 years and is now 8.2%. What was the rate 10 years ago? whats the number by itself please help!!

User Charm
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1 Answer

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10.5 in the correct answer but, I do not know the formula to get the answer.  If you figure it out please let me know. Thanks 
User Shelda
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