Answer» Body Mass Index (BMI):Step 1 : Weight of person in kgand height in metres is taken.Step 2 : Divide the weight by the square of the height.BMI = Weight/(height)2Step 3 :If BMI < 18.5, then person is undernourished.If BMI > 25, then person is overweight. (Note : This criterion is not applicable to growing children) Full form BODY MASS INDEX formulaWEIGHT IN KG UPON HEIGHT IN MTRS