To calculate the percent decrease in the price of the jacket, we can use the formula:
\[ \text{Percent Decrease} = \frac{\text{Original Price} - \text{Selling Price}}{\text{Original Price}} \times 100 \]
Substituting the original price ($139.99) and the selling price ($59.99) into the formula:
\[ \text{Percent Decrease} = \frac{139.99 - 59.99}{139.99} \times 100 \] \[ = \frac{80.00}{139.99} \times 100 \] \[ \approx 0.5715 \times 100 \] \[ \approx 57.15 \]
Rounding to the nearest whole percent, the percent decrease in the price of the jacket is approximately 57%.