Percentage Calculator is a free Chrome add-on developed by bobbyrne01. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory. This program allows users to perform basic percentage calculations with ease.

With Percentage Calculator, users can perform various percentage calculations, including finding out what is X% of Y, determining what percentage X is of Y, calculating the percentage increase or decrease from X to Y, adding or subtracting a percentage from X, multiplying X by a certain percentage, and dividing X by Y%.

The program is designed to be simple and straightforward, making it accessible for users of all levels of experience. It provides a convenient tool for anyone who frequently needs to perform percentage calculations for work, school, or personal use.

Please note that the developer, bobbyrne01, accepts donations for continued development of the Percentage Calculator. Donations can be made through PayPal or Bitcoin, as indicated on the developer's website.

Percentage Calculator is an open-source program released under the GNU GPL v3 license. For more information and to access the source code, visit the program's GitHub repository.