A trader marks his goods at a profit of 150 and his loss is 175 what is his gain.

Ha loss = 99%

Those numbers make no sense, either as absolute quantities or as percentages.

To find the trader's gain, we need to determine the difference between the marked price (profit) and the cost price.

Let's denote the cost price as "C".

According to the given information, the trader marks his goods at a profit of 150. This means the selling price (marked price) is 150 more than the cost price:

Selling Price = Cost Price + Profit
Selling Price = C + 150

Additionally, it is mentioned that the trader's loss is 175. This implies that the selling price is 175 less than the cost price:

Selling Price = Cost Price - Loss
Selling Price = C - 175

Since the selling price must be the same in both cases, we can equate the expressions for selling price:

C + 150 = C - 175

By simplifying the equation, we get:

150 = -175

This equation is not possible because the left-hand side (150) is positive, while the right-hand side (-175) is negative. Hence, there is no solution to this equation, indicating that the given information is contradictory and not possible in real circumstances.

Therefore, we cannot determine the trader's gain based on the given information.