With this information, you can calculate the quantity of days 18 hours is equal to.
¿What is the inverse calculation between 1 day and 18 hours?
Performing the inverse calculation of the relationship between units, we obtain that 1 day is 1.3333333 times 18 hours.
Which is the same to say that 18 hours is 0.75 days.
Eighteen hours equals to zero days. *Approximation
A day is one times eighteen hours. *Approximation