Answer: B. 5/12 miles
Step-by-step explanation:
Given: The distance they hiked on Saturday= 9/12 mile.
On Sunday they hiked distance= 4/12 mile.
Now, the difference between the distances they hiked on Saturday and Sunday is given by :_
Difference in distance=[tex]\frac{9}{12}-\frac{4}{12}[/tex] miles
Since, their denominators are same, thus they are like fractions.So we take denominator as same and subtract numerator.
Difference in distance=[tex]\frac{9-4}{12}=\frac{5}{12}[/tex] miles
hence, B is the right answer.