For this case we can propose a rule of three and thus find the original price of the cap.
15% --------------> $2.70
100% ----------> x
Where "x" represents the original price of the baseball hat, that is, without offering a discount:
![x = \frac {100 * 2.70} {15}\\x = 18](https://img.qammunity.org/2020/formulas/mathematics/middle-school/t42qderewpdp2i5f3gu7yjt6jfwr901hid.png)
So, we have the original price of the baseball hat is $18
To find the answer we remove 15% of the total price and have:
![0.85 * (18) = 15.3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/gfavroroq61qey89l8jjlh4lz289h20uzm.png)
Answer:
The full price of the baseball hat is $15,3