The table below shows the CPI and the nominal price of a Big Mac in January 2015 and January 2023.      January 2015 January 2023 CPI 235 300 Big Mac $4.79 $5.81 By what percentage did the real price of a Big Mac change between January 2015 and January 2023?     Use positive numbers to indicate an increase and a negative number to indicate a decrease. Do not increase the "%" symbol in the box. Include 2 decimal places in your answer.

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