To calculate the time elapsed from 0 days, 16 hours, and 42 minutes ago, we first convert the hours and minutes into the same unit of time. There are 24 hours in a day, so 16 hours is 16/24 or 0.67 days. Adding the converted hours to the original 0 days gives us 0.67 days. Next, convert minutes to days. Since there are 60 minutes in an hour, 42 minutes is 42/60 or 0.7 days. Adding this to the previous total gives us 0.67 + 0.7 = 1.37 days ago.