A shopkeeper sells his articles at their cost price but uses a faulty balance which reads 1000 gm for 800 gm. What is the actual profit percentage?

Explanation

The shopkeeper sells 800 gm of goods but charges the customer for 1000 gm. His profit is 200 gm on an actual cost of 800 gm. Profit percentage = \frac{200}{800} \times 100 = 25\%.

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