A CD that regularly sold for $17.99 is marked 10% off.
How much is the sale price of the CD?
The sale price of the CD is $17.99 - (10/100) * $17.99 = $17.99 - $1.799 = $<<17.99-(10/100)*17.99=16.19>>16.19. Answer: \boxed{16.19}.
To calculate the sale price of the CD, we need to determine the amount of the discount and subtract it from the original price.
Step 1: Convert the discount percentage to decimal form.
10% = 10/100 = 0.10
Step 2: Calculate the discount amount.
Discount amount = Original price * Discount percentage
Discount amount = $17.99 * 0.10 = $1.799
Step 3: Subtract the discount amount from the original price to get the sale price.
Sale price = Original price - Discount amount
Sale price = $17.99 - $1.799 = $<<17.99-1.799=16.191>>16.191
Therefore, the sale price of the CD is $16.191.