A car drove 200 miles using 10 gallons of fuel. Which operation should be used to compute the miles per gallon?

To find miles per gallon, you need to determine how many miles are traveled for each gallon of fuel. This requires dividing the total number of miles driven by the total number of gallons used. In this case, you would divide 200 miles by 10 gallons. The result of this operation provides the rate of miles per gallon, which gives a clear understanding of fuel efficiency. Therefore, division is the appropriate operation to calculate the miles per gallon in this situation.