With this information, you can calculate the quantity of days 15 hours is equal to.

¿What is the inverse calculation between 1 day and 15 hours?

Performing the inverse calculation of the relationship between units, we obtain that 1 day is 1.6 times 15 hours.

Which is the same to say that 15 hours is 0.625 days.

Fifteen hours equals to zero days. *Approximation

A day is one times fifteen hours. *Approximation