I think it’s -1/20
= -7/20 + -1/20
= -8/20
You divide the denominator by 4 to get 5 since 4 x 5 = 20.
The unknown numerator has to be divided by 4 to get 2. Therefore, 8 divided by 4 is 2.
And the sign will stay the same because they are the same and it’s addition.
-7/20 + -1/20 = -8/20 = -2/5
