The answer is 7/12. To arrive at this result, note that the LCM (least common multiple) of 4 and 6 is 12, so we need to expand both fractions so that their denominators are both 12. So, 5/6 = 10/12 and 1/4 = 3/12.
Now we have to perform the subtraction (dealing in fact only with the numerators): 10/12 − 3/12 = 7/12. Read more