## Elementary Algebra

To find the percentage change, we use the following formula: percentage change = $\frac{New\ amount\ -\ Original\ amount}{Original\ amount}$ $\times$ 100% This year, 504 students applied, while last year 450 applied. So, the new value is 504 while the old one is 450. Substituting these values into the formula yields: percentage change = $\frac{504\ -\ 450}{450}$ $\times$ 100% percentage change = $\frac{54}{450}$ $\times$ 100% percentage change = 0.12 $\times$ 100% percentage change = 12% Because the percentage change is a positive number, it is a percent increase.