Answer:
[tex]\text{ \$53.33}[/tex]Explanation:
Here, we want to get the original price of the shirt
If the discount on the shirt is 25%, this means what he paid was 75% of the actual
Let the actual cost be $x
Mathematically:
[tex]\begin{gathered} 75\text{ \% of \$x = \$40} \\ \frac{75}{100}\times\text{ x = 40} \\ \\ 75x\text{ = 40 }\times\text{ 100} \\ x\text{ = }\frac{4000}{75} \\ x\text{ = \$53.33} \end{gathered}[/tex]