In the olive and canola oil groups , post-intervention grading of fatty liver was reduced significantly ( grade I , from 73.3 % to 23.3 % and from 60.5 % to 20 % , respectively [ P < 0.01 ] ; grade II , from 20 % to 10 % and from 33.4 % to 3.3 % , respectively [ P < 0.01 ] ; and grade III , from 6.7 % to none and from 6.1 % to none , respectively ) .