Final answer:
To find the original price of Lisa's desk, we divide the sale price of $243.20 by 0.38, which gives us the original price of $640.
Step-by-step explanation:
To calculate the original price of Lisa's desk, we can set up an equation where $243.20 represents 38% of the original price. Let's denote the original price as P.
We can represent this in equation form as 0.38P = $243.20. To find P, we divide both sides of the equation by 0.38:
P = $243.20 / 0.38
P = $640
Therefore, the original price of the desk was $640.