See how a running total differs from a rate of change, using parcels and rain...

https://fair-wiki.win/index.php/Why_Does_%E2%80%9CPer%E2%80%9D_in_Units_Matter_So_Much%3F

See how a running total differs from a rate of change, using parcels and rain as examples. The article explains what each number means, why units matter, and how a time window—per hour, per day, or this week—can change the story in a work chart.