Answer:
The distance from 68 miles to 42.5 miles decrease .
The Percentage of change is 37.5% .
Explanation:
Formula
![Percentage\ change = (Change\ in\ value* 100)/(Initial\ value)](https://img.qammunity.org/2019/formulas/mathematics/high-school/ijidjpjpu8s6yy6oe8f0gx5w7ejo476l34.png)
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 = (25.5* 100)/(68)](https://img.qammunity.org/2019/formulas/mathematics/high-school/6rt8t94ua9lt2tdpq4u9hny5vs2phmg876.png)
![Percentage\ change = (25500)/(68* 10)](https://img.qammunity.org/2019/formulas/mathematics/high-school/yt73ivjquz3c19fv62sp7sr8ft7xgzwruz.png)
![Percentage\ change = (25500)/(680)](https://img.qammunity.org/2019/formulas/mathematics/high-school/si5jungkk9z460ewvmhpm4yh1kzkq76xou.png)
Percentage change = 37.5 %
Therefore the Percentage of change is 37.5% .