Imagick convert to resize / reduce image

Batch resize images and reduce quality

To resize to 2000px and preserve the aspect ratio:
convert my-image.jpg -resize 2000 my-image-new.jpg

To reduce quality:
convert my-image.jpg -quality 85% my-image-new.jpg

To batch reduce quality AND overwrite the original image:
find -iname *.jpg | xargs -I{} convert {} -quality 85% {}