With this information, you can calculate the quantity of hours 21 minutes is equal to.
¿What is the inverse calculation between 1 hour and 21 minutes?
Performing the inverse calculation of the relationship between units, we obtain that 1 hour is 2.8571429 times 21 minutes.
Which is the same to say that 21 minutes is 0.35 hours.
Twenty-one minutes equals to zero hours. *Approximation
A hour is two times twenty-one minutes. *Approximation
