A shopkeeper gave 10% discount on a furniture set and further he added 20% discount to buyer. Find the percentage discount given by shopkeeper.
1). 0%
2). 21%
3). 22.5%
4). 25%
Let the initial marked price be Rs. 100
First discount = 10%
New selling price = Rs. 90
Successive discount = 20%
Final selling price = 90 - (20/100) × 90 = Rs. 72
Total discount percentage = (100 - 72)/100 × 100 = 28%