Chapter 2 - Solving Equations - 2-10 Change Expressed as a Percent - Practice and Problem-Solving Exercises - Page 148: 15

There was an increase of about $27\%$.

Change in value: $=\text{new amount} - \text{original amount} \\= 1685.60-1325.60 \\= 360$ There was an increase. Percent Change: $ =\dfrac{\text{change in value}}{\text{original amount}} \\=\dfrac{360}{1325.60} \\\approx 0.27 \\\approx 27\%$ There was an increase of around $27\%$.