hello 54% actual margin was the wrong answer and i followed the steps that a chegg tutor had used. please let me know how to solve this and what the right answer is

2) you buy 300 shares of Qualnycoupe for $30 per share Wan Ininal margin of soi. The nor doy, Quality cap price $ 23 por share. your actual margh is L. at This mcc. drops to dchal margin tual vulve @ The end 300 hwes x $30 rs here = 87,500 Ininal murgia 300 shares X $23 = 6,900 x d. so = 3,450 a crue margin = [(torul mawe --Inimae Maqin) Turat vau ] X10o =(7,500 - 3,450) X100 7,500] E = 4,050 -0.54 X 100 = (54%. 7,500 UAL Phan