In a food processing plant hot water at 90°C is needed at the rate of 140% of the commodity capacity. Steam at atmospheric pressure is used for heating the water available at 25°C. Latent heat of condensation at atmospheric pressure is 2257 kJ kg-1, net calorific value of hull is 12552 kJ kg-1 and specific heat capacity of water is 4.184 kJ kg-1 K-1. Steam is generated by utilizing the hulls received as by-product from the same plant at the rate of 22% of the commodity capacity. Assuming 20% heat loss, percentage of hull used with respect to the total available amount of hull is _____________.