A microfiltration membrane has a pure water flow of 800 L/m²h at 1 bar and 25C. When an oil/water emulsion is concentrated at 1 bar, the flux reduces to 300 L/m²h due to a cake formed on the membrane surface. After cleaning the membrane with water for an established time, the flow obtained for water is 420 L/m²h, also at 1 bar. Determine the percentage of irreversible transport resistance. The viscosities of water and emulsion can be considered equal to 1 cP. 1 cP = 1x10^-3 Pa.s.