24 1/5 is equal to 24.2
Multiply 24.2 by 7.75
24.2* 7.75 = 187.55
So she made $187.55 before taxes
To get the distance between
and
, we subtract
from 
That is,

We change the mixed number to improper fraction now to get,

This is the same as,

We collect LCM to be 4

This gives us,


Convert back to mixed number to get,

Therefore the distance between the two numbers is 
Note that the other way round will result in negative value. That is subtracting 6 from
will give 
But since this is distance we find the absolute value and get the same result.

Option A, there seems to be no error