Graphics all about Discount, Markup, and Commission
http://zenmoneyblog.blogspot.com/2010/07/auction-vs-discount.html
This picture can show about how there is a discount going on in the store. I would listen to the sign and go see what the sign is talking about. Discounts are very easy to find in stores on even at yard sales.
This picture is talking about commission and how you take money away. When you think of a subtaction problem, think of it mainly with money and then you have commission. This picture is from http://www.opensecrets.org/news/2010/03/barack-obamas-debt-commission.html
MARKUP
This picture would explain that you would use a calculator to look for your total sale price. When you find the discount you would subtract some numbers and your total would be your markup. This picture is from
http://medt3401.blogspot.com/2010/07/calculators-in-classroom_18.html
http://medt3401.blogspot.com/2010/07/calculators-in-classroom_18.html