To convert 80 kilometers per hour to miles per hour, you can use the following step-by-step instructions:

Step 1: Understand the conversion factor

1 kilometer is equal to 0.621371 miles. This is the conversion factor we will use to convert kilometers to miles.

Step 2: Set up the conversion equation

We can set up the conversion equation as follows:

80 kilometers = ? miles

Step 3: Apply the conversion factor

Multiply the given value (80 kilometers) by the conversion factor (0.621371) to convert kilometers to miles:

80 kilometers * 0.621371 miles/kilometer = 49.70968 miles

Step 4: Round the answer (if necessary)

Since we are dealing with a measurement involving distance, it is common to round the answer to a reasonable number of decimal places. In this case, we can round the answer to two decimal places:

49.70968 miles ≈ 49.71 miles

Therefore, 80 kilometers per hour is approximately equal to 49.71 miles per hour.