-5 is the same as -5/1 -5/1 - 5/3 Find the common denominator which is 3 in this case and multiply the numerator by 3 to get the two fractions to the same denominator. -15/3 - 5/3 Now subtract 5 from -15 which will be -20 -20/3 is the answer. Turn it into a decimal if needed to. Or mixed fraction -6 2/3