# Fixed width columns with displaystyle entries in an array

I cannot figure out why I get error messages like ! Missing $inserted. I would appreciate your help with this situation. \documentclass[a5paper,12pt]{book} \usepackage{amsmath,amssymb} \usepackage{array} \begin{document} \begin{equation*} \begin{array}{r@{\ } >{\displaystyle}m{2cm} r@{\ } >{\displaystyle}m{2cm}} 1. & {{1}\over{50}} & 2. & {{22}\over{25}} \\ 5. & {{60}\over{24}} & 6. & {{49}\over{140}} \\ 9. & {{30}\over{125}} & 10. & {{102}\over{150}} \end{array} \end{equation*} \end{document}  • don't use \over but if you do, then you don't need any of the braces, & 1 \over 50 & but instead use & \frac{1}{50} & Feb 2 at 14:58 • Welcome to TeX.SE! Feb 2 at 14:58 ## 1 Answer You need to be in math mode so >{$\displaystyle}m{2cm}<{\$}


But never use \over in LaTeX`.