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Mahesh borrowed $6,085 from Becky. He signed a contract agreeing to pay it back 9 months later with 5.15% simple interest.

After 7 months. Becky sold the contract to Stan at the price that would earn Stan 5.00% simple interest per annum.

Calculate the simple interest rate that Becky earned during the period that she held the contract.

Express your answer as a percentage rate rounded to 2 decimal places but don't include the % sign