Explanation:
The first step is to identify the time units you're interested in.
If your number is a number of hours, and you want the value in hours, then you already have 1/50 hours, and no conversion is necessary. Of course, you may want to express that as a decimal: 0.02 hours.
If you have 1/50 years, and you want to convert to days, then you need to use a conversion factor. We generally write those as a fraction with the same value in numerator and denominator, but with units chosen to give the ones we want.
(1/50 years) × (365 days)/(1 year)
= (365/50) (years·days/years) = 7.3 days
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Often, there is some difficulty with hours, minutes, and seconds. The same process as above is used for each of the various time divisions.
Using our example of 1/50 years, we now have 7.3 days. Continuing the conversion to finer units of time, we recognize that ...
0.3 days = (0.3 days) × (24 hours)/(1 day)
= (0.3×24) days·hours/days = 7.2 hours
and
0.2 hours = (0.2 hours) × (60 minutes)/(1 hour)
= (0.2×60) hours·minutes/hour = 12 minutes
In the end, we have ...
1/50 year = 7 days 7 hours 12 minutes.
