[NTG-context] \textfraction query

Is there a way to get \textfraction to produce output in cases B or C (either one will do) as it does in case A? If I use \vfrac the output does not sit well beside \textfraction output—and I use the latter elsewhere throughout the document. \definefontfeature[fraction][frac=yes] \definehighlight[textfraction][style={\feature[+][fraction]}] \starttext A. \textfraction{1/2} B. \textfraction{1.5/2} C. \textfraction{{2\textfraction{1/2}}/7} \stoptext Alan