To represent the original price \( p \) of the shirt, we know that the current price ($7.98) is half of the original price. Therefore, we can set up the equation:
\[ \frac{p}{2} = 7.98 \]
To find \( p \), we can multiply both sides of the equation by 2:
\[ p = 7.98 \times 2 \]
Now, we can calculate the value:
\[ p = 15.96 \]
So, the original price of the shirt is:
\[ p = 15.96 \text{ dollars.} \]