Note: it’s important that CF formulas be entered relative to the “active cell” in the selection, which is assumed to be B4 in this case. Once you save the rule, you’ll see only values that are integers (whole numbers) highlighted. We use this fact to construct a simple formula that tests the result of MOD. When the result is zero (i.e. when the number is an integer) the formula returns TRUE, triggering the conditional formatting. When the result is not zero (i.e. the number has a decimal component, and dividing by 1 leaves remainder) the formula returns FALSE.

### Dave Bruns

Hi - I’m Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.