Required information [The following information applies to the questions displayed below.] The income statement for Pruitt Company summarized for a four-year period shows the following: An audit revealed that in determining these amounts, the ending inventory for 2017 was overstated by $18,000. The company uses a periodic inventory system. 2. Compute the gross profit percentage for each year before the correction and after the correction. (Round your answers to the nearest whole percent.)