If selling price is doubled, the profit triples. Find the profit percent.

Let cost price = C and original selling price = S

Condition

When the selling price is doubled, profit becomes triple:

2S − C = 3(S − C)2S − C = 3S − 3C⇒ 2C = S

Original profit
Profit = S − C = 2C − C = CProfit% = (C ÷ C) × 100 = 100%

Final Answer: Profit percentage = 100%.