Increase sales price based on the discount I would like to offer

Question

I would like to increase my selling price based on the discount I offer so I never drop below a threshold. For Example

I sell an item at $100, which is the least I can sell at, but I would like to increase the selling price to offer 25% discount so I come back to my original price of $100 after discount. In this case if I increase the cost of my item to $135 and give 25% discount, I will come back to $100.

How do I calculate my selling price based on the discount I would like to offer.

Thanks

Answer 1

p represents the selling price

p - 0.25p = 100

0.75p = 100

p = 133.33