Categories Machine Learning“Data Imbalance Explained: Why 99% Accuracy Can Still Be Useless By Vaishnavi Ganeshkar Estimated read time 1 min read September 15, 2025 Press enter or click to view image in full sizeIf you built a machine learning model that’s 99% accurate, you’d probably celebrate, right? 🥳Not so fast. In the world of imbalanced data, high accuracy can actually mean… your model is useless.Sounds crazy? Let’s unpack it.