A $15 item on sale for $12 is marked down what percent?

100 * $12 = $1200

$1200/$15 = $6000

Did I do the correct work, or is it this:

100 * $3 = $300

$300/$15 = $4500

Is the first work correct or is the second work correct?

2 answers

Neither of your answers comes remotely close to the answer. You're looking for a percent not a huge dollar figure.

15 - 12 = 3

3/15 = 0.2

Multiply 0.2 to get the percent.

0.2 = 20%
I you sure is right