A clothing store offers a dress initially at $100. Then one week later, the store offers the dress at 15% off. The dress still doesn't sell, so after another week, the store reduces its new price by 20%. How much does the dress cost now?

Question: A clothing store offers a dress initially at $100. Then one week later, the store offers the dress at 15% off. The dress still doesn't sell, so after another week, the store reduces its new price by 20%. How much does the dress cost now?Solution:For the first discount, we have 100(1 - 0.15) = 100(0.85) = 85. So the dress is worth $85After the second discount, we have 85(1 - 0.20) = 85(0.8) = 85 × (4/5) = 17 × 4 = 68So the final dress price is $68