I wanted to share a useful online tool I recently came across: http://calcularporcentajeonline.es. It provides a fast and user-friendly way to calculate percentages, increases, decreases, and related math operations without any complexity. Tools like this can be very helpful for developers, students, and data analysts who need quick calculations during testing, documentation, or daily tasks. I really appreciate the simplicity and clean interface, and I think it could be a valuable reference resource for the community. Keep up the great work!