Because I always forget how math works, this Shortcut asks for a current and previous result of a measurement, then shows (and copies to clipboard) the percentage change between the two numbers.
I use this for work, comparing, say, a current month's metric's result to the previous month to give a sense of how things are moving along.
What I also like is that after calculating, the Shortcut asks if I need to do another calculation (who likes only one calculation?!) and, if yes, runs itself again. I thought that was kind of clever.
Download the Calculate percentage change Shortcut →