Before a race, you start #4 5/8# feet behind your friend. At the halfway point you are #3 2/3# feet ahead of your friend. What is the change in distance between you and your friend from the beginning of the race?
is a change of
There are two parts to be considered:
A distance of
Therefore, the change in distance is the sum of these distances:
You could also regard the distance behind the friend as being negative and then subtract to find the difference:
Which will produce the same result as shown above.