A complex calculation can result in a number with many decimal places . However, we hardly ever work with these values on a day-to-day basis. Both when keeping accounting and when working with percentages or units of measurement, we usually use numbers with only two decimal places. Therefore, sometimes, the most logical thing is to round the numbers down and set values that are useful to us.
In Excel, there are several ways to do it. For example, many users are familiar with the option to configure cells so that a specified number of decimal places is displayed. However, this only modifies the presentation of the value, not the value itself: in reality, the underlying number remains the same, with all its decimals, even though they are not displayed. This may make sense if we want to continue calculating with that number, but sometimes it is convenient to round it down. In this case, we have to use a formula like ROUNDLESS..