This percentage calculator makes it easy to add or subtract percentages from a given value. Just input the original amount and the percentage you want to add or subtract, and the app will do the rest. The result is displayed in a clear format and can be copied to your clipboard with a single tap. Whether you're a student needing to calculate grades, a business owner calculating profits, or anyone else working with percentages, this app is for you. Download now and start simplifying your calculations!