By selling 92 kg of wheat, a person gains the selling price of 12 kg of it. His gain percentage is:

15%

Direct concept = if By selling 92 kg of wheat, a person gains the selling price of 12 kg

then,

Profit % = \(\frac{Gaining \; Quantity}{Selling \; Quantity - Gaining \; Quantity}\) × 100

Profit % = \(\frac{12}{92 - 12}\) × 100 = 15%