Cut: how can i get one message from a output of a command line tool

Hello all,

i want to catch the % info of a command line process, how can i cut this message out?

command line tool:
mogrify -monitor -maximum /boot/home/.besly/ImageMagickGUI/temp

terminal output:
Load/Image//boot/home/.besly/ImageMagickGUI[temp]: 1727 of 1728, 100% complete
Evaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1000 of 1728, 57% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1050 of 1728, 60% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1100 of 1728, 63% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1150 of 1728, 66% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1200 of 1728, 69% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1250 of 1728, 72% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1300 of 1728, 75% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1350 of 1728, 78% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1400 of 1728, 81% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1450 of 1728, 83% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1500 of 1728, 86% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1550 of 1728, 89% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1600 of 1728, 92% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1650 of 1728, 95% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1700 of 1728, 98% completEvaluate/Image//boot/home/.besly/ImageMagickGUI[temp]: 1727 of 1728, 100% complete

You can use:

mogrify -monitor -maximum /boot/home/.besly/ImageMagickGUI/temp | sed -r 's/.+, ((100|[0-9]{1,2})%).+/\1/'