Average gas prices in Ohio has dropped more than 20 cents over the past week, though drivers still are paying more than they were this time last year. A gallon of regular gas averaged $3.43 in Monday’s survey from Auto Club AAA, the average a week ago was 22 cents higher at $3.65. A year ago, the cost was about $3.88. In Zanesville gas is selling for as low as $3.20 a gallon on the West Pike near McDonald’s. Oil prices remain near eight month lows. The cost of crude has plummeted over the past two months amid increasing signs of a slowdown in the global economy, led by Europe that could reduce demand for crude. Nationally, the average price for regular gas is about $3.41, down a dime from last week.