Percentage Change in Weight (%) = (Change in Weight (kg) / Initial Weight (kg)) x 100%

Step 1: Break Down the Problem

The formula for calculating the percentage change in weight is given. To use this formula, we need to identify two key components:

1. Change in Weight (kg)
2. Initial Weight (kg)

Step 2: Relevant Concepts

The formula for percentage change in weight can be expressed as: $\text{Percentage Change in Weight} (\%) = \left(\frac{\text{Change in Weight (kg)}}{\text{Initial Weight (kg)}}\right) \times 100\%$

Step 3: Analysis and Detail

To find the percentage change in weight, we proceed with the following calculations:

1. Determine Change in Weight: This is the difference between the initial weight and the final weight. $\text{Change in Weight} = \text{Final Weight} - \text{Initial Weight}$
2. Substitute the values into the formula: After calculating the change in weight, substitute this value into the percentage change formula along with the initial weight.

Step 4: Verify and Summarize

Ensure all values are correctly substituted, and calculations are verified. The result will provide insight into how much the weight has changed in percentage terms compared to the original weight.

Final Answer

The percentage change in weight can be calculated using the provided formula once the initial weight and change in weight are known.