Answer:
<em>P</em> + (.25)(<em>P</em>)
Step-by-step explanation:
First off I WANT A DIAMOND PONY :)
<em>P</em> stands for what the price of the pony is, and (0.25)(<em>P</em>) is the diamond pony tax that has to be added to the original price.
Hope I helped, and if you are extremely grateful, send me a diamond pony :D
:)
please follow the pic if you need more help let me know
Original:350 discount:87.50 off new price: 262.5