Use the following information about Rat Race Home Security, Inc. to answer the questions: Average selling price per unit $336. Variable cost per unit $188 Units sold 488 Fixed costs $8,766 Interest expense 13,512 Based on the data above, what will be the resulting percentage change in earnings per share of Rat Race Home Security, Inc. if they expect operating profit to change -4.2 percent? (You should calculate the degree of financial leverage first). (Write the percentage sign in the "units" box).