First we have to find out how much the Mulraney's square footage increases with the addition. To do this, we should multiply the percent of expansion, 8% (0.08) by their current square footage (2, 550)
0.08 * 2,550 = 204
This means that the addition is adding 204 square feet to the Mulraney's house.
To find the total number of square footage, we just add the original (2,550 feet) to the addition (204).
2,550 + 204 = 2754
Therefore, the square footage of the Mulraney's home with the addition is 2754 square feet.