A person sells an article for Rs 550, gaining `1/(10)` of its C.P. Find gain percent.

Explanation

To solve the problem step by step, we will follow these instructions:

### Step 1: Define the variables
Let the cost price (C.P.) of the article be Rs. X.

### Step 2: Calculate the gain
According to the problem, the gain is given as \( \frac{1}{10} \) of the cost price. Therefore, the gain can be expressed as:
\[ \text{Gain} = \frac{1}{10} \times X = \frac{X}{10} \]
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