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There is not aside from firing through the images on your own computer. I like to flip through the images in a built in OS preview thumbnail and pick a recognizable feature feature on the top edge of the image. If it appears on the top edge and then only two more times, that corresponds to 66% overlap. If it shows up 3 more times it is 75%. 4 more is 80% and so on.
Make sure you don't ruin your exif tags in Lightroom and be sure to keep the original file copies on hand.