Need help with math question on interest rate!!!

Canada
November 17, 2008 9:57am CST
k here it goes i cannot figure it out but if you can figure it out please type on how you did it will simple numbers and signs so ill better understand it.. thanks :) Hanna's retirement plam grew from $3164.00 to $3315.61 in 10 months. What annual rate of interest does Hanna's plan pay?
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