)×100 Calculation: Let the Cost Price (CP) of 1 kg be ₹100. Since the shopkeeper uses a weight that is 26% less, the weight used is 74% of 1 kg . ⇒ Actual weight used =0.74kg Selling Price (SP) for 0.74kg=₹100 (as he claims to sell at cost price for 1 kg ) Profit = SP - CP for 0.74 kg CP for 0.74kg=0.74×100=₹74 Profit =100−74=₹26 Profit Percentage =