It is difficult to provide a definitive answer because you need to think about when you start counting and how many leap years are in the 15 year period.
This is how you would go about it:
Definitions:-
* 365 Days in a Year * (366 Days in a leap year) * 24 hours in a day * 60 minutes in an hour Thus (ignoring leap years) 15*265*24*60 = 7,884,000 minutes
15 years = 7,885,000 minutes.
.25 would be 15 minutes.
15 months = 657,000 minutes.
15 months = 657,000 minutes.
15 hours is 900 minutes.
15 minutes
15 hours = 900 minutes.
75 = 60 + 15 1 hour 15 minutes
About 15 minutes.
15
about 15 minutes
15 minutes