A hardware store sells a 5-pound box of nails for $16.80. The store is having a 20 percent off sale on all merchandise. What is the sale price of one 5-pound box of nails?

$13.44 is the sale price of one 5-pound box of nails.

Now can you help me? I posted my question and need an answer.

To find the sale price of one 5-pound box of nails, we first need to calculate the discount amount. The discount is given as 20 percent off, so we need to find 20 percent of the original price, which is $16.80.

To calculate the discount, multiply the original price by the discount rate:
Discount = 20% of $16.80 = (20/100) * $16.80

To find the sale price, subtract the discount amount from the original price:
Sale Price = Original Price - Discount Amount

Now we can calculate each step:

First, calculate the discount amount:
Discount = (20/100) * $16.80
Discount = 0.20 * $16.80

Next, calculate the sale price:
Sale Price = $16.80 - Discount

Now let's solve these calculations step by step:

First, calculate the discount amount:
Discount = 0.20 * $16.80
Discount = $3.36

Next, calculate the sale price:
Sale Price = $16.80 - $3.36
Sale Price = $13.44

Therefore, the sale price of one 5-pound box of nails is $13.44.