Increase / decrease decimal for range of cells with different number formats WITHOUT changing the number formats other than the decimal place

Hi Experts,

How do I increase / decrease decimals for a given group of cells - that contain various number formats - without changing the formats of those cells other than decimal place?

For example, I have three cells:  1) 50.0, 2) $50.0 and 3) 50.0%.  If I highlight these three cells and click the increase decimal button, the cells output to 50.00, 50.00 and 50.00 in which the last two cells replicate the format of the first cell and lose there original formatting.  Is there an efficient way to do this where output is 50.00, $50.00 and 50.00%...keeps the increase/decrease decimal button functionality but also keeps existing formats for cells?  

It seems pretty silly that the Excel command buttons do not take this - cells with different formats - into consideration.  If a macro is required, does anyone know how to write one that will do this?

Thanks in advance.