Marked price = 2800
Selling price= 2100
Marked price =Selling price + Discount
Discount = Marked price - Selling price
=2800-2100
=700
Discount percentage is always calculate on the marked price.
Let thediscount percentage be x.
marked price × (x/100) = discount
⇒ x = (700 x 100) / (2800)
⇒ x = 25
Therefore, the rate of discount is 25%.