NUM_FRAC_DENOM
jump_sline = sc_height * jump_sline_fraction / NUM_FRAC_DENOM;
shift_count = sc_width * shift_count_fraction / NUM_FRAC_DENOM;
off_t perden = (percent * (NUM_FRAC_DENOM / 100)) + (fraction / 100);
return (muldiv(pos, perden, (off_t)NUM_FRAC_DENOM));