## Elementary Algebra

Her previous job paid 12.00 dollars per hour. Her new job pays 10.20 dollars per hour. To find the percent change, we use the following formula: percent change = $\frac{New\ amount\ -\ Original\ amount}{Original\ amount}$ $\times$ 100% The original salary was 12.00 dollars per hour. The new salary is 10.20 dollars per hour. Substituting these values into the formula yields percent change = $\frac{10.20\ -\ 12.00}{12.00}$ $\times$ 100% percent change = $\frac{-1.80}{12.00}$ $\times$ 100% percent change = -0.15 $\times$ 100% percent change = -15% Because the percent of change is a negative number, it is a percent decrease.