In the question it is already given the amount of actual gasoline and money consumed before the fuel efficiency gets increased by 25% Gasoline consumption before the increase in fuel efficiency = 25 gallons per week Gasoline saved after the increase in fuel efficiency = [25 * (25/100)] gallons per week = 6.25 gallons per week So every week 6.25 gallons of gasoline can be saved after increasing the efficiency of the automobile by 25%. Then The amount of money saved against the 6.25 gallons of gasoline saved = (6.25 * 2) dollars = 12.50 dollars The amount of money saved is $12.50 per week.
