What is the percent weight change for a female who weighs 160 lb with a usual body weight of 180 lb?

To find the percent weight change for the individual, you can use the formula:

[

\text{Percent Weight Change} = \frac{\text{Usual Weight} - \text{Current Weight}}{\text{Usual Weight}} \times 100

]

In this case, the usual body weight is 180 lbs, and the current weight is 160 lbs. Plugging the values into the formula gives:

[

\text{Percent Weight Change} = \frac{180 - 160}{180} \times 100

]

[

= \frac{20}{180} \times 100

]

[

= \frac{1}{9} \times 100 \approx 11.11%

]

Rounding gives a percent weight change of approximately 11%. This calculation shows that the individual has experienced a weight loss from their usual body weight, indicating that the change is both significant and clinically relevant.

Understanding this calculation is important for health professionals, as percent weight change can be a key indicator of a patient's nutritional status and potential health risks. Monitoring weight changes is essential in dietetics to provide appropriate interventions for underweight or overweight individuals.