To start, we will convert all the numbers to be having a denominator of 4 as follows: 4 is equivalent to 16/4 -8 (3/4) is equivalent to -24/4 1/4 already has 4 as a denominator
Now, the new expression became: 16/4 - 24/4 + 1/4
Since they all have a common denominator, the result can be computed by adding numerators as follows: 16/4 - 24/4 + 1/4 = (16-24+1) / 4 = -7/4