the answer is 3/4
explanation: in order to add fractions with unlike denominators, you need to find the least common multiple of the two numbers. the least common multiple is 4 in this case, so you need to use multiplication to change 1/2 into 2/4. since 1/4 already has a denominator of 4, it can be left as is. now you just add 2/4 and 1/4 together to get 3/4.