If a person walks 15,840 feet, how many miles did they walk?

Step 1 ：Step 1: Identify the conversion factor between feet and miles. We know that 1 mile = 5,280 feet.

Step 2 ：Step 2: Set up the conversion so that the desired unit will be cancelled out. In this case, we want miles to be the remaining unit. \(\frac{15840\ feet}{1} * \frac{1\ mile}{5280\ feet}\)

Step 3 ：Step 3: Carry out the conversion. \(\frac{15840}{5280} = 3\ miles\)