A dishonest shopkeeper sells mangoes at ₹30/kg bought at ₹20/kg and he is giving 800 g instead of 1 kg. The shopkeeper's actual profit percentage is:

Cost price (CP) per kg = ₹20.

Selling price (SP) per kg = ₹30. 

Instead of 1 kg, the shopkeeper is giving 800 g, i.e., 0.8 kg.

Profit Percentage = $$\frac{\text{Profit}}{\text{Cost Price}} \times 100$$  

Solution:  ​

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