How do you convert kilometers to miles?

To convert kilometers to miles, the correct approach is to divide the number of kilometers by 1.609. This is because one kilometer is equivalent to approximately 0.621 miles. Therefore, when you want to find how many miles correspond to a certain number of kilometers, you take the total kilometers and perform the division by 1.609 to arrive at the value in miles. This conversion factor is derived from the relationship between the two units of measurement; hence, using division is the accurate method for this conversion.

For context, multiplying by 0.621 is a method to convert miles to kilometers, which is not what is needed in this question. Subtracting 1.609 or adding 1.609 does not apply to unit conversion in this case as neither operation would yield the correct number of miles from kilometers. Thus, the division by 1.609 is the only proper method for completing the conversion from kilometers to miles.