Answer:
The distance from 68 miles to 42.5 miles decrease .
The Percentage of change is 37.5% .
Explanation:
Formula

Where
Change in value = |Final value - Initial value|
As given
68 miles to 42.5 miles .
Thus the distance decrease .
Final value = 42.5 miles
Initial value = 68
Change in value = |42.5 - 68|
Change in value = |-25.5|
Change in value = 25.5
Putting all values in the formula



Percentage change = 37.5 %
Therefore the Percentage of change is 37.5% .