Tracking pounds and measuring your body mass index, or BMI, are well-known ways of monitoring your weight loss. Doctors, however, might suggest you lose a percentage of weight instead of a set number of pounds. According to the Centers for Disease Control and Prevention, losing 5 to 10 percent of your body weight can reduce your risk of serious problems such as high blood pressure and diabetes. To track your weight loss as a percentage, use some basic math skills.
Record your starting weight, which is what you weigh before you begin a healthy weight-loss plan that includes eating right and exercising.
Weigh several days or weeks later on the same scale in the same location and the same time of day as the first weigh-in. Most people prefer to weigh first thing in the morning before eating or drinking anything so results are consistent. Place the scale on the same floor each time to maintain consistency; putting a scale on a carpeted floor instead of a tile floor can skew the results.
Subtract the new weight from your original one. For example, if you weighed 200 pounds before you started losing weight and you now weigh 150 pounds, you've lost 50 pounds.
Divide the amount you lost -- in this example, 50 pounds -- by your original weight. If you divide 50 by 200, you get 0.25.
Multiply the answer by 100: 0.25 multiplied by 100 calculates to be 25, or 25 percent. This is the percentage of body weight you've lost.
- Losing 10 percent of your body weight can reduce your risk of obesity-related diseases even if it doesn't bring you below a BMI that's considered overweight or obese, according to CDC. If you start at 200 pounds and lose 10 percent, that's 20 pounds.