Percent Calculator (Pro) – Amazon Appstore for Android – Free app of the day

Calculate a variety of real-world percentages. This utilities app specifically calculates discounts, price markups, profit margins, percentage differences, and tips. It’s great for shopping trips and pricing research, online or in-store. A clear interface and easy-to-read fields simplify percent-based math for you

Get it here
http://www.amazon.com/mobile-apps/b/ref=topnav_storetab_mas?ie=UTF8&node=2350149011
http://www.amazon.com/gp/product/B004S2FUH4?ie=UTF8&ref=mas_faad