The marked price of a chair was Tk. 12,800/-. The shopkeeper was offering it for a discount of 20% but on further bargaining agreed to offer a successive discount and finally sold the chair for Tk 9,216/- What was the second discount offered by him?

Price after 1^stdiscount of 20% = (100-20)%
= 80% of Marked Price
∴ Price = (80/100) × 12800
= Tk. 10240

SP = (100 - Discount) % of Price

∴ 9216 = (100 - Discount) % x 10240
⇒ (100 - Discount)/100 = 9216/10240
⇒ 100 - Discount = (9216 × 100)/10240
⇒ 100 - Discount = 90
⇒ Discount = 100 - 90 = 10%

10% is the percent of 2^nddiscount offered.