Setting the rounding precision forces Excel to always round numeric values to a specified number of digits following the decimal, saving you from having to use the ROUND function on each formula. Here’s how it works.
Note that setting Excel’s rounding precision can save time, but be certain you want to round all values before you enable this feature. When Excel is set to round numbers, it deletes the extra data following the precision point you set, permanently affecting the accuracy of the numbers in your workbook. This means, for example, that if a value like “12.7851698” is displayed with two digits after the decimal point, then Excel will permanently delete the “51698” and leave only the “12.76” remaining.