The answer would be 2 7/20. I got that because you find the most common multiple of each of the numbers, I just went with 20 because you multiply the two denominators and get 20. Then you take the numerator 3/5= 12/20 1/4= 5/20 so then subtract the two whole numbers (4-2) which would be 2. You take the two new numerators and subtract them so it would be 12-5= 7 you keep the denominator and it would end up as 2 7/20 because you can not reduce it. Hope this helps!!