## Elementary Algebra

At the beginning, the client weighted 320 pounds. At the end, the client weighted 280 pounds. To find the percent change, we use this formula. Percent of change = $\frac{New\ amount\ -\ Original\ amount}{Original\ amount}$ $\times$ 100% Percent of change =$\frac{280\ -\ 320}{320}$ $\times$ 100% Percent of change = $\frac{-40}{320}$ $\times$ 100% -0.125 $\times$ 100 = -12.5%