Use Find & replace and select GREP. Then enter the regular expression to search for a number and to replace with number + quotation mark (depending on the font, you should not use the quotation mark)
That's going to add the mark after EVERY digit.
First, do you have a unique paragraph or character style applied to number in the table that might differentiate them from other numbers or other locations? Or could you select just a column of the table with the numbers?
Next, are all the numbers whole numbers, or are the decimals, too? Is there anything else besides the number in the cell?
In a case like this a screen shot of a representative table area would help immensely.
Actually, Doc's change expression is wrong, too. Not only is it going to add a " after what was every digit, it's going to make every digit into \d as well, so 123 will become \d"\d"\d".
Thank you for your reply. This is what one page of the document look should look like after inches are applied. There are 46 other pages with different products and dimensions. The tables all have the same character style applied, however, there is one spec: YDS that will not need “ marks.