To find the time in the past from a certain duration, you can simply subtract the given minutes from the current time. Let’s say the current time is 3:45 PM and you want to know the time 20 minutes ago. You would subtract 20 minutes from 3:45 PM to get the result.

Formula: Current time – x minutes = Time in the past.

For example, if it is currently 7:30 AM and you want to find the time 15 minutes ago, you would calculate: 7:30 AM – 15 minutes = 7:15 AM.

This method of finding time in the past is commonly used in various fields like astronomy, history, and even everyday situations to track events accurately. It provides a simple yet effective way to determine past timings.