The following formula is used to calculate percentage mass: Finally, divide the gram formula mass for iron by the total gram formula mass of iron (III) oxide and convert to a percentage.

The molar mass is also used to calculate the percent composition of an element. These two terms are explained here. Read the complete article for more information. Molar mass is the mass of one ...

Calculating weight loss percentage is a way to see your weight ... waist or other body-part measurement, body mass index, or BMI, body fat percentage and weight loss percentage.