the question does not present the options, but this does not interfere with the resolution
we know that
The distance between two points on a number line can be found by taking the
absolute value of the difference between those two points.
let
a-----> (5/2)-----> multiply by (4/4)-----> 20/8
b-----> 4 7/8----> ((4*8+7)/8----> 39/8
the distance between a and b= absolute value (b-a)
or
the distance between a and b= absolute value (a-b)
therefore
the distance between a and b= absolute value (b-a)
absolute value (b-a)-----> absolute value (39/8-20/8)
absolute value (19/8)----> 19/8
the distance between a and b= absolute value (a-b)
absolute value (a-b)-----> absolute value (20/8-39/8)
absolute value (-19/8)------> 19/8