- 1 day is equivalent to 24 hours
So we will divide 12, 250 hours by 24 to find how many days he had been at school

This proves that, Joe has been at school for 510 days and hours.
- On the second step, 365 days is equivalent to 1 year. This will help us to find how many years he has been at school

So the correct answer is 1.4 years