I disagree with Jada. The perimeter decreases by a total of 1. The following math can be utilized to solve for why Jada is incorrect:
3 + 6 + 6 + 9 = 24
Therefore, quadrilateral A is equal to 24.
2 + 6 + 6 + 9 = 23
Therefore, quadrilateral B is equal to 23.
24 > 23 by one number.
Hence, Jada is incorrect. Since the side lengths go down by 1 in this scaling, the perimeter goes down by 1 in total.