Using the given information, it's not possible to answer the question. Using the given information, we have no idea where 'J' is. For all we know, it might not even be on the same planet as 'L' or 'K'.
"Inverse property" is the one property of addition among the choices given in the question that is shown below. The correct option among all the options that are given in the question is the fourth option or the last option. I hope that this is the answer that has actually come to your great help.
Let the width of table B be w, and since area of table A = area of table B, then 6 2/3 x 3 1/2 = 4 1/4 x w [this is the required equation] 20/3 x 7/2 = 17/4 w 17/4 w = 70/3 w = 70/3 / 17/4 = 70/3 x 4/17 = 280/51 = 5 25/51