How to align numbers with \sim in tabularray in LaTeX?

Question

I need to align numbers as 99.88%~9.8% in tables in LaTeX:

\documentclass{article}
\usepackage{siunitx,amsmath,tabularray}
\UseTblrLibrary{booktabs, siunitx}
\begin{document}
\begin{table}
\begin{talltblr}{colspec={X[c] X[c,si={table-format=2.2\%}]}}
1&{{{$11.11\%\sim55.56\%$}}}\\
2&{{{$5.12\%\sim21.2\%$}}}\\
3&{{{$6.78\%\sim2.1\%$}}}\\
\end{talltblr}
\end{table}
\end{document}

The result is:

Is there a way to align them with si={table-format=2.2%\sim2.2%}?

Answer 1

Putting them in {{{ … }}} would disable the effect of the siunitx library, so I don't you want to do that.

I would just put the two sides of \sim in their own columns, and use the @{} operator to put the \sim between the columns. This precludes using X as the colspec, unfortnately, however, as this makes the columns too wide, but it's not clear why you would want that much space for them anyway.

\documentclass{article}
\usepackage{tabularray}
\UseTblrLibrary{siunitx}
\begin{document}
\begin{table}
\begin{tblr}{colspec={Q[c] S[table-format=2.2\%]@{\ $\sim$\ }S[table-format=2.2\%] }}
1&11.11\% &55.56\%\\
2&5.12\% &21.2\%\\
3&6.78\% &2.1\%\\
\end{tblr}
\end{table}
\end{document}