There are 3 methods to use the ROUNDDOWN function in Excel to round up numbers, and we have explained all of them in this post.

A. You can round your time calculations to the nearest 10th of an hour, or six-minute increment, as follows. You must break down the time values into hours, minutes, and seconds (using the HOUR, ...

This post shows how to use the TRUNC function in Excel. Use it to remove or truncate decimals, time from date-time format, etc. It is the opposite of Round.