First thing you must do is find out how many minutes in in an hour:
One hour = 60 minutes
The question is asking you how many minutes is 2/6 of an hour, for most fractional equastions you must turn the minutes to a fraction, and multiply the fraction together. Luckily, for this one you don’t have to because 2/6 of 60(an hour) is equal to 20.
Hope this helps! :)