Hi, this stopped working, possibly after a related change to org-table-eval-formula 2 days ago.

| a | b | percent of a in b |
|----+----+-------------------|
| 10 | 20 | #ERROR |
| 20 | 30 | #ERROR |

#+TBLFM: $3=($1/$2)*100;%.2f%%

A simpler format string like ;%.2f also fails.

It seems the regexp doesn't allow the leading %.

This leading % appears in the manual, so this syntax is correct.

| =$1+$2;%.2f= | Same, format result to two decimals |