I use Wordbee, an online translation tool. When I choose Microsoft MT to pre-translate the source text, the numbers with brackets (e.g. [12,000] or [1.23]) will be translated into brackets with numbers (e.g.,  12,000 or  1.23). It is so strange. Segments such as [20.2%] will also be translated into  20.2%.
I also asked this question a couple of days ago. https://microsofttranslator.uservoice.com/forums/291942-general/suggestions/15815941-wordbee-api