Final answer:
The cost of the airfare from Atlanta, Georgia to Nashville, Tennessee decreased by 28% when the ticket price went down from $250 to $180.
Step-by-step explanation:
To determine by what percentage the cost of airfare decreased, we need to calculate the percentage change. The original cost of a ticket was $250, and it decreased to $180. To find the percentage change, subtract the final amount from the initial amount, divide by the initial amount, and then multiply by 100 to get a percentage:
- Percentage Change = ((Initial Amount - Final Amount) / Initial Amount) × 100%
- Percentage Change = (($250 - $180) / $250) × 100%
- Percentage Change = ($70 / $250) × 100%
- Percentage Change = 0.28 × 100%
- Percentage Change = 28%
Therefore, the cost of the airfare from Atlanta, Georgia to Nashville, Tennessee decreased by 28%.