Profit (P) = Selling price (S) – Cost price (C)P = S-C ...(1) According to question – 3P = 2S – C ...(2) Subtracting eq (1) from eq (2) 2 P = S Putting S in eq (1) P = 2 P – C ⇒ C = P ....(3) profit % = {(Selling price Cost price)}/{Cost price} × 100 =(