A shopkeeper sold article by giving 10% discount and 10% further discount for cash-payment. The cost price of the article for the shopkeeper is ₹800 and the marked price of the article is ₹1000. If the buyer buy the article by using his credit card, then find the profit percentage earned by the shopkeeper.
1
1.25%
2
25%
3
12.5%
4
2.5%