because 20 is the lenght but shana is tryna find the total.to find the total u need the leenght times width and the width would be 3.1 because if 3.1 times 20 t will be 62 which is the total feet
Well you can either think of actually dividing the fraction or reduce to lowest forms which is 1/2. then from 1/2 you can either divide that or just say it is .5.