Final answer:
To calculate the percentage of monthly gasoline prices in 2005 that exceed all other years' prices, compare the prices for each month in 2005 with the prices for the same months in other years and calculate the ratio.
Step-by-step explanation:
In order to determine the percentage of monthly gasoline prices in 2005 that exceed all the other years' monthly gasoline prices, we need to compare the prices for each month in 2005 with the prices for the same months in other years. If we find that the price in a certain month in 2005 is higher than the prices in the same month for all other years, we can consider it as exceeding all the other years' prices. To calculate the percentage, we would divide the number of months where prices exceed all other years' prices by the total number of months in 2005 and multiply by 100.