Conditional Formatting in excel based on another column

You can do it as follows (I'll assume that the 4.9755 is in cell A1, change as applicable):

1. Select the range of A1 to A10.

   

2. Pull up the conditional formatting dialog and select the option that requires a formula.

   

3. Put the formula =B1>0 and pick the formatting with font as green.

   

4. Press OK and repeat for the negative values, except using =B1<0 for the formula and the font as red for the formatting.

   

The number formatting doesn't need conditional formatting, you can simply select the two columns and format as appropriate.

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If you want to format both columns at the same time, you can select both colums and use the formula =$B1>0 for green and =$B1<0 for red:

Jerry's answer is correct. Excel is adaptive, but you must make sure the formula looks exactly like he shows. If you click on cell B1 the formula will show =$B$1>0 rather than =$B1>0. The formula cannot contain the $ before the number 1 or it will not be adaptive. The $ symbol locks the formula, which is helpfull in other situations, but not here.