Make sure they have common denominators.
-2/3 x (2/2) = -4/6
-4/6 + -4/6 = -8/6
-8/6 = - 1 2/6
-1 2/6 or -1 1/3 simplified, is your answer
hope this helps
Step-by-step Answer:
Since there are no repetitions in the five letters of the word ZEBRA, the number of permutations is 5! = 120 = 5*4*3*2*1.