LANSING, Mich. (Great Lakes News) – Gas prices are down slightly to start the week in Michigan.

AAA Michigan says the average price is down three-cents to $3.15 per gallon. That is a penny less than last month and 82-cents more than last year.

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Grand Rapids has the lowest prices in the state at $3.06 while Marquette’s $3.29 is the most expensive.