The price of an article is first increased by 20% and subsequently decreased by 25% due to a reduction in sales. Find the net percentage change in the price of the article.

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1. **Assume the original price of the article is Rs. 100:**  
   - After a 20% increase, the new price becomes:  
     $$100 + \frac{20}{100} 	imes 100 = Rs. 120.$$

2. **Apply a 25% decrease to the new price (Rs. 120):**  
   - Reduction = $$\frac{25}{100} 	imes 120 = Rs. 30.$$  
   - New price after reduction = $$120 - 30 = Rs. 90.$$

3. **Calculate the net change in price:**  
   - Net change = Original price - Final price = $$100 - 90 = Rs. 10.$$  
   - Net percentage change = $$\frac{10}{100} 	imes 100 = 10\%$$ (decrease).

Thus, the net percentage change is **10% decrease**, and the correct answer is **(a)**.

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