If the shirt is $60\%$ off, it is currently $.4$ of the original price.  Thus the original price was

$$\frac{\$14.40}{.4}=\boxed{\$36}$$
Question:
A shirt's sale price is marked $\$14.40$, which is $60\%$ off the original price. How many dollars was the original price of the shirt?
Answer:
Let's think step by step.

user
\$36
A shirt's sale price is marked $\$14.40$, which is $60\%$ off the original price. How many dollars was the original price of the shirt?
test