To find the amount Tracey will save on the headphones originally priced at $80.99 with a 25% discount, we can use the following equation:
Savings = Original Price × Discount Rate
In this case, the original price is $80.99, and the discount rate is 25%, or 0.25 in decimal form. So the equation becomes:
\[ \text{Savings} = 80.99 \times 0.25 \]
This equation can be used to calculate the amount Tracey will save.