In 3 3/4 hours one day in January, it snowed 3 ft in Amarillo. How much snow fell per hour?

3 feet / 3.75 hours = 0.8 feet of snow per hour

Since you are trying to find how much it snowed per hour you would divide the amount of snow by the amount of hours so you would divide 3 by 3.75 to get 0.8 feet (8 inches) of snow each hour

Divide 3 over 3.75 to get 0.8 feet of snow each hour