(1) TFe%=0.02237*28.59*5*55.85/1000.0*100%=17.86%
(2) FeO%=0.02237*15.60*5*71.85/1500.0*100%=8.36%
(3) Fe2O3%=0.02237*(28.59-15.60/1.5)*5*159.7/2/1000.0*100%=16.25%
or Fe2O3(%)=(17.86/55.85-8.36/71.85)*159.7/2=16.24(%)
(1) TFe%=0.02237*28.59*5*55.85/1000.0*100%=17.86%
(2) FeO%=0.02237*15.60*5*71.85/1500.0*100%=8.36%
(3) Fe2O3%=0.02237*(28.59-15.60/1.5)*5*159.7/2/1000.0*100%=16.25%
or Fe2O3(%)=(17.86/55.85-8.36/71.85)*159.7/2=16.24(%)