The answer is 1.5 or 1 1/2 or 3/2 whatever you prefer :)
How to solve
First write all numerators above the common denominator
So it’s now 4-1 / 2
Then you subtract the numbers
Which is now 3/2
And that’s how I got 3/2 or 1.5 or 1 1/2 whichever one you prefer ... hope that helps:)