Final answer:
Hong paid $10.80 for an item originally priced at $18 after receiving a 40% discount off the regular price.
Step-by-step explanation:
The student's question is about calculating the sale price of an item after a discount has been applied. The process involves mathematics, specifically percentage calculation. Hong bought an item with a regular price of $18, and the sale offers a 40% discount.
To determine the discounted price, we first convert the percentage to a decimal by dividing 40 by 100, which gives us 0.40. We then multiply the regular price of the item by this decimal: $18 × 0.40 = $7.20.
This result is the amount of the discount. Subtracting the discount from the regular price will give us the final price Hong paid for the item: $18 - $7.20 = $10.80. Therefore, Hong paid $10.80 for the item on sale.