Discount percentage and percent increase

If a product is $100 and I purchase it at 15% discount, I pay $85. How do I calculate if I want to resell that same product for 30% more than I paid for it? Not 30% above the original price before my discount.

Original price * 0.15 = Discounted amount
Original price - Discount amount = Amount that I pay
Amount that I pay * 0.30 = Amount to increase
Amount that I pay + Amount to increase = Cost to customer ?

Or is this *way* off...?

From this formula..
100 * 0.15 = 15
100 - 15 = 85
85 * 0.30 = 25.5
85 + 25.5 = 110.5


Thanks
LM

Looks good to me.