Well as you can see, the correct way to do it is by unsimplifying 1/3, basically multiplying it until the first fraction's denominator is equal with the second one's. By multiplying 3 x 4, we can determine the denominator (12) in this instance is the same as the second fraction 5/12. Now we do the same with the numerator (1). Just like the denominator, we multiply it by 4 to get, well, 4. Now we have 4/12. Because 5 is one number greater than 4, 5/12 is bigger.
