If a motorcyclist travels 425 miles while using 5.2 gallons of gasonine, to find the gasdoline consuption in miles per gallon, we need to divide the total of miles traveled by 5.2. To find 425/5.2, we must perform division on the product 4250/52 (it's the same, but it's easier to divide with whole divisors). 4250/52 is 81.730.... Since we want to find it to one decimal place, we look at the second decimal point and since it's not greater than or equal to 5, we don't round, meaning that our answer is 81.7 mpg.