1. 5/8 square foot in ¼ hour. Find the unit rate.
 Since the given numbers are fraction, let’s convert these into decimals to be able to get the correct unit rate.
 => 5/8 = 0.625 or 0.63 square foot.
 => ¼ = 0.25 hour or 15 minutes.
 => 0.625
 now, let’s show the unit rate of 5/8 square foot in ¼ hour.
 => 0.63 square feet / 15 minutes 
 Divide the square feet value by 15
 => 0.042 square feet / minute