x= 0.137744,y=2.271,z=12,(y/0.3048*sqrt(5/7)*2/7*(1 (1 x)*sqrt(5/7))/(1 sqrt(5/7))/(y/0.3048*sqrt(5/7)*2/7*(1 (1 x)*sqrt(5/7))/(1 sqrt(5/7)) z*(y/1.83)^2*(1 x)*abs(1 x)*5/7))*100