Answer:
72.1 and -48.1
Step-by-step explanation:
I set up the equations x + y = 24 and x*y=-3468. Then I substituted for y and used the quadratic formula to come to two numbers rounded to about 72.1 and -48.1. Hope that helps :)
By comparing the perimeters, we can deduce the scaling factor:

The areas scale with the square of the scaling factor, so the new area is

103 stays because it is the whole number and the next number after the decimal is below 5.
103 is your answer.