Final answer:
The house's value decreased by $25,020 and the current value of the house is $252,980.
Step-by-step explanation:
To calculate the decrease in value of the house, we need to find 9% of $278,000. To do this, we multiply $278,000 by 0.09, which gives us $25,020. So, the house's value decreased by $25,020. To find the current value of the house, we subtract the decrease from the original value. $278,000 - $25,020 = $252,980.