Answer is -3 11/24 We know we have -5/6 added to -2 5/8 First we have to make the denominator the same for both fractions. 24 is a number that is divisible by both 6 and 8. See attachment for the math. Now we have -20/24 and -2 15/24 Combine negative numbers to add them together. Now we have -2 35/24, you need to reduce to simplest terms. Your fraction -35/24 is an improper fraction so divide -35/24 and you get -1 11/24 so combine that with your -2 for a total of -3 11/24