How do you find discount?

Answer 1

If you are asking about a sale where prices are discounted. Multiply the percentage (X percent as X divide 100) by the original amount to find . To find the new price, subtract the discount amount from the original price.

Answer 2

On Amazon you could use this:

http://shopsheep.com

they also have a Google chrome app:

http://shopsheep.com/shopsheep.crx.php

a safari extension:

http://shopsheep.com/shopsheep.safariextz.php

and an Opera widget:

http://shopsheep.com/widget/amzn_dscnts.wgt