Final answer:
The relative change in the price of a gallon of gas, which decreased from $4.25 to $3.23, is approximately 24%.
Step-by-step explanation:
The calculation of the relative change in the price of a gallon of gas involves subtracting the old price from the new price and then dividing the result by the old price. For instance, if the price declined from $4.25 per gallon to $3.23 per gallon, the relative change is determined by ($4.25 - $3.23)/$4.25, resulting in $1.02/$4.25. This calculation equals approximately 0.24 or a 24% decrease in the price.