A trader marks up a product by 20%. If he sells it at a discount of 15%, his net gain percentage is,
2%
Let the CP of the product be ₹ 100
Thus the marked price, MP = ₹ 120
Discount on MP =15%
∴ Discount =15100 × 120=₹ 18
∴ SP = MP − discount
=120 - 18
=102
Hence his net gain percent is 2%.