<html xmlns="http://www.w3.org/1999/xhtml"> <head> <style> @font-face { font-family: Ahem; src: url(../fonts/Ahem.ttf); } math { font: 25px Ahem; } </style> </head> <body> <math xmlns="http://www.w3.org/1998/Math/MathML"> <mfrac linethickness="100%"> <mn>1</mn> <mn>2</mn> </mfrac> </math> </body> </html>