How do you calculate percentage of weight loss ?

 The percentage of weight loss is calculated using the following formula:

$\text{Percentage Weight Loss}=\left(\frac{\text{Initial Weight}-\text{Current Weight}}{\text{Initial Weight}}\right)\times 100$

Here's a step-by-step guide on how to calculate the percentage of weight loss:

1. Determine Initial Weight:

   • Identify the weight you started with, which is often referred to as the initial weight.

2. Determine Current Weight:

   • Measure your current weight. This is the weight at the time you want to calculate the percentage of weight loss.

3. Calculate the Difference:

   • Subtract your current weight from your initial weight: $\text{Initial Weight}-\text{Current Weight}$.

4. Calculate the Percentage:

   • Divide the difference by the initial weight: $\frac{\text{Initial Weight}-\text{Current Weight}}{\text{Initial Weight}}$.

5. Multiply by 100:

   • Multiply the result by 100 to express the percentage: $\left(\frac{\text{Initial Weight}-\text{Current Weight}}{\text{Initial Weight}}\right)\times 100$.

The formula provides a percentage that represents the amount of weight lost compared to the initial weight. If the result is negative, it means there has been a weight loss. If the result is positive, it indicates weight gain.

For example, if your initial weight was 200 pounds, and your current weight is 180 pounds:

$\text{Percentage Weight Loss}=\left(\frac{200-180}{200}\right)\times 100=\left(\frac{20}{200}\right)\times 100=10\mathrm{\%}$

In this example, the percentage of weight loss is 10%.