Correct option is A
Given:
Marked price (M) / Selling price (S) = 13:9
Formula Used:
Discount percentage = ((Marked price - Selling price) / Marked price) ×100
Solution:
Discount percentage = ((13 - 9) / 13) ×100 = (4 / 13) ×100 ≈ 30.77%
Thus, the discount percentage is 30.77%.