1, because 0, is 0/6, 1/2 also equals 3/6, and 1 equals 6/6. Of all these numbers, 5/6 is closest to 6/6 which equals one. If this is confusing for you, take out the denominators: think logically. Is 5 closer to 0, 3, or 6? 6. Therefore, when you plug back in the denominators, the answer is 6/6 or 1.