A shirt is discounted by 20% and then an additional 10% is taken off the discounted price. What is the total percentage discount?

✓ Correct Answer: Option A

Let original price be P. After 20% discount, price is 0.80P. After another 10% off that, price is 0.80P * 0.90 = 0.72P. The final price is 72% of original, so total discount is 100% - 72% = 28%.