Certain pharmaceutical or herbal weight loss remedies can cause a diuretic effect which can lead to

FDA has developed these questions and answers (Q & A’s) to help all of consumers, health care practitioners, and the general public understand FDA’s actions regarding weight loss products contaminated with various prescription drugs and chemicals.  Many of these products are marketed as dietary supplements.

If you are using a calculator, follow PEMDAS which states that you do division first then add. So do 3 divided by 1 1/3 and then add the 1/2