Question: how to subtract fractions with a negative?
Answer: Subtraction of negative fractions follows the same method. Thus, if the negative fractions you are adding do not have the same denominator, you can make it so. -1/2, for example, can be written as -2/4, -3/6, -4/8, et cetera. In each case, the number at the top is always half the number at the bottom.