The first step is to change our improper fraction to a mixed number. -3/2 = -1 1/2. The key to figuring out what number is the largest when it comes to negatives is which one is closer to 0, or the farthest to the right if it were on a number line. in this case -4/5 is the largest number because it is the farthest to the right if it were in a number line.