Final answer:
The question involves calculating the percentage of weight loss using the formula (usual weight - actual weight) / usual weight × 100. This calculation is commonly used in health studies to analyze the effectiveness of weight loss programs.
Step-by-step explanation:
The formula provided (usual weight less actual weight divided by usual weight, times 100 equals the percentage of weight loss) is a mathematical expression used to calculate the percentage of weight loss. This calculation is fundamental in understanding statistical data in health-related studies. In practice, let's assume the usual weight of a person is 150 pounds and their actual weight after a diet program is 140 pounds. The calculation would be as follows:
Usual Weight = 150 lb
Actual Weight = 140 lb
Percentage of Weight Loss = ((150 - 140) / 150) × 100
Percentage of Weight Loss = (10 / 150) × 100 = 6.67%
In the context of the provided information, understanding how to calculate the percentage of weight loss can be vital in studies and programs related to health statistics like the mean amount of weight lost by people on a special diet, adherence to a low-calorie diet, exercising, or any other behavioral interventions for weight loss.