Drop zeros from tables

Hello,

Pretty simple question but I have not been able to get the answer to. How can I drop zeros from numbers such as 2,857.50 to 2,857.5

I have been using the formula:
“columnDefs”: [ { “orderSequence”: [ “desc”, “asc” ], “targets”: [ 1, 2, 3, 4 ] } ]

however this will not insert commas: 2857.5

Ill then try this:
“columnDefs”: [ { “targets”: [ 1, 2, 3, 4 ], “render”: $.fn.dataTable.render.number( ‘,’, ‘.’, 2, ” ) } ]

This will keep the comma but not drop off the zero.

Any help would be much appreciated!