First you need to set up an equation. We want to know what the numerator is because the denominator does not change.
11/14 - X/14 = 4/14
Because all the known denominators are the same, we can drop the numerators.
11 - X = 4
Now just shift the equation around until X is by itself
11 - x = 4
11 = 4 + x
11 - 4 = x
7 = x
x = 7
Your answer should be 7/14, or 1/2
