Percentage change

Divide the movement by where you started, so a change reads as a share of the original rather than as raw units. This lets you compare items of wildly different sizes, and keeps small absolute moves from looking trivial when they are large relative to the base.

Divide the movement by where you started, so a change reads as a share of the original rather than as raw units. This lets you compare items of wildly different sizes, and keeps small absolute moves from looking trivial when they are large relative to the base.

Example

Instead of plotting weight in pounds, plot change from your day-one number: down 4% over six months. Now your progress sits on the same scale as your resting heart rate, down 6%, and you can see which is moving faster.