The high-dollar french fryer that the local burger joint just purchased was advertised as being capable of making up to 52 pounds of fries per hour. Even the best trained employee at the restaurant can only achieve a rate of 39 pounds of fries per hour. Sally Mae was assigned fry duty at her last shift and was able to make 31 pounds of fries per hour. What utilization of the fryer was Sally Mae able to achieve? Express as a percentage rounded to the nearest one decimal place (79.372% would be expressed as "79.4")