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An hour is 60 minutes, so 40 minutes is 2/3 of an hour.
There are 60 minutes in an hour. Four minutes = 4/60 = 2/30 = 1/15.
1/5 ---------- 20% No No. fifteen minutes = 1/4 one quarter of an hour 0r 25 % there are 60 minutes in one hour 30 minutes in 1/2 half an hour and 15 in a quarter of an hour.
It is half an hour because 30/60 = 1/2
10 minutes is 1/6 of an hour.