#### Explanation:

Multiply by the percentage as a decimal. 75% is the same as multiplying a number by 0.75. For example, 75% of 100 (which is 75) is the same as 0.75 multiplied by 100 (which is also 75).

$12.00 \cdot 0.75 = 9$, so the CD Can be bought on eBay for \$9.