1/2 x 4/4 = 4/8
So , ? = 4
the answer should be 4/8 hopefully because first of all you need to use a method that can help you save your life which is cross multiplying.
you multiplied first 1 times 8 and then divide by 2 in which you will get an answer of 4/8 and to check it you divide 1/2 which gives you 0.5 and then divide 4/8 to see if it is an equivalent fraction and it will give you 0.5 in which yes sir its an equivalent fraction so 4/8 is the correct answer and have a great day.