Place mouse cursor over fraction below. Tooltips content should reflect position of pointer.
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> <mfrac> <mrow> <maction actiontype="tooltip"> <mn>43867</mn> <mtext>Mouse pointer is over numerator</mtext> </maction> </mrow> <mrow> <maction actiontype="tooltip"> <mn>798</mn> <mtext>Mouse pointer is over denominator</mtext> </maction> </mrow> </mfrac> </math>