6x^2 is the answer. thanks for asking it.
Percent change = (new number - old number)/(old number) * 100
percent change = (54 - 48)/(48) * 100 = 6/48 * 100 = 0.125 * 100 = 12.5%
If I understand your question well, I suppose you mean

Answer:
5 by 99
Step-by-step explanation:
its 5 by 99
squares:
16
25
36
49
64
81