Leah  discuss the complexities of VA disability calculations, often referred to as "VA math." Rebecca explains how the VA combines individual disability percentages using a unique formula rather than simple addition, ensuring veterans receive an accurate overall disability rating. The video introduces a VA disability calculator on ProVet Legal’s website, which veterans can use to simplify this calculation process. They cover key concepts, including the "whole person approach," rounding rules, and the bilateral factor, which can impact a veteran’s combined rating if disabilities affect both sides of the body. Rebecca encourages veterans with concerns about their rating accuracy to consult an attorney for a free case review, and she emphasizes using tools like the calculator to gain better insight into their VA disability benefits.