Question

A person walks 1/4 mile in 18 hour. The person's speed is __ miles per hour.

Answer 1

Speed is distance/time, so set up the following equation:
$speed = \frac{distance}{time} = \frac{\frac{1}{4}mile}{18\ hours}=.01388888...\ mph$
So your answer is approximately .0139 mph.

Answer 2

0.25 divided by 18 equals 0.014 miles per hour.