Abu Bakar HasanNorizarina IshakSharma Rao A/l Balakrishnan2024-05-282024-05-28201924/12/2019Abu Bakar Hasan, Norizarina Ishak and Sharma Rao A/l Balakrishnan, 2019. Performance Outcomes in Learning Additional Mathematics by Grey Theory Approach. Journal of Engineering and Applied Sciences, 14: 1875-1878.1816-949X10.36478/jeasci.2019.1875.1878https://medwelljournals.com/abstract/?doi=jeasci.2019.1875.1878https://oarep.usim.edu.my/handle/123456789/6581Grey system theory has evolved, since, it was first introduced roughly 40years ago. It has been used in many applications and environments by different researchers worldwide. The aim of this study is to demonstrate the said theory in education environment by looking at the performance outcome in learning a mathematical subject at secondary school level through analysis and forecasting. The results show that the GM(1,1) Model produced 3.8% mean relative percentage error and future research will focus on how to optimize the forecasting.en-USGrey relational analysis, grey modelling, examination forecasting, GM (1,1) Model, environment applicationsArticle18751878146