What fraction of an hour is 40 minutes?
We know that,
There are in all sixty minutes in an hour.
Now,
We need to represent 40 minutes out of those 60 minutes.
Hence,
The fraction of 40 minutes in a day can be represented as 
5
What fraction of an hour is 40 minutes?
We know that,
There are in all sixty minutes in an hour.
Now,
We need to represent 40 minutes out of those 60 minutes.
Hence,
The fraction of 40 minutes in a day can be represented as