An MRI uses strong magnets to take an image of your muscles. To find the mass percent composition of an element divide the mass contribution of the element by the total molecular mass. Once you have the initial and final masses of your substance subtract to determine the.
Method 2 Step 1.
Lbs lost divided by starting weight. Learn how to find percent change in this free math video tutorial by Marios Math Tutoring. To calculate the percentage increase. Person B started at 130lbs and went to 110lbs.