the average healthy adult is approximately __________ percent water.
By weight, the average human adult male is approximately 60% water and the average adult female is approximately 55%. There can be considerable variation in body water percentage based on a number of factors like age, health, weight, and sex. In a large study of adults of all ages and both sexes, the adult human body averaged ~65% water. However, this varied substantially by age, sex, and adiposity (amount of fat in body composition).