Answer :
The portion of a human's body weight that is above the waist can vary based on individual body characteristics, including body composition, proportions, and distribution of muscle and fat. However, there's a commonly used estimation that might help to answer this question:
It is generally estimated that the portion of an average person's body weight that is above the waist is about two-thirds, or approximately 2/3.
This estimation is based on the distribution of mass in the average human body, where the head, arms, and the upper part of the torso, which are above the waist, contribute to a significant portion of the body's weight, but not all of it.
So, based on this general estimation, the most fitting answer to the question "What portion of your body weight is above your waist?" would be 2/3. However, it's important to stress that this is a rough average, and individual measurements may vary. To obtain an accurate proportion for a specific individual, precise anthropometric measurements would be necessary.