Only in texinfo-7.1-new/tp/t: output_files
diff -ur texinfo-7.1/tp/Texinfo/Convert/HTML.pm texinfo-7.1-new/tp/Texinfo/Convert/HTML.pm
--- texinfo-7.1/tp/Texinfo/Convert/HTML.pm	2023-10-18 15:10:12.000000000 +0200
+++ texinfo-7.1-new/tp/Texinfo/Convert/HTML.pm	2024-06-02 08:25:13.602227480 +0200
@@ -5256,7 +5256,7 @@
   my $cf = $multitable->{'extra'}->{'columnfractions'};
   if ($cf) {
     if (exists($cf->{'extra'}->{'misc_args'}->[$cell_nr-1])) {
-      my $fraction = sprintf('%d',
+      my $fraction = sprintf('%.0f',
                              100*$cf->{'extra'}->{'misc_args'}->[$cell_nr-1]);
       $fractions = " width=\"$fraction%\"";
     }