You make 15 miles in an hour, considering that the 7.5 miles is half the miles of what you are traveling which is 15, It would take you a half hour.
So 7.5 miles / 15miles per hour = 0.5 hours which is half an hour.
You cancel the miles (the unit) to end up with the results in terms of time.
You make 15 miles in an hour, considering that the 7.5 miles is half the miles of what you are traveling which is 15, It would take you a half hour.
So 7.5 miles / 15miles per hour = 0.5 hours which is half an hour.
You cancel the miles (the unit) to end up with the results in terms of time.