The Cost price of 1 kg cashew nuts = Rs.700
Cost price of 50 g of cashew nut = (700*50)/1000 = 35
The selling price of 50 g cashew nuts = Rs.45
Profit = Selling Price -Cost price = 45-35 = 10
Profit % = Profit x 100/Cost price
Profit % = 10 x 100/35 = 28.57% profit
Hence, the answer is 28.57% profit