\input{umtest-preamble} \usepackage{amsmath} \usepackage{unicode-math} \setmathfont{Cambria Math} \begin{document} \unimathsetup{active-frac=normalsize} \[ ¼ ½ ¾ ⅐ ⅑ ⅒ ⅓ ⅔ ⅕ ⅖ ⅗ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞ \] \unimathsetup{active-frac=small} \[ ¼ ½ ¾ ⅐ ⅑ ⅒ ⅓ ⅔ ⅕ ⅖ ⅗ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞ \] \end{document}