Return calculations for the investment shown in the following table, calculate the rate of return eamed over the unspecified time period. (Click on the con located on the top-right comer of the data table below in order to copy its contents into a spreadsheet.) Cash flow Beginning-of- End-of- during period period value period value -5430 $24.700 $22.400 The rate of retum on the investment in %. (Round to two decimal places. If there is a loss, enter as a negative percentage)