Put the values of the variables in place of the variables in the expression, then do the arithmetic.

Answer: (+) 1/3
Step-by-step explanation: 2/3 + -1/3 is basically subtracting 1/3 from 2/3 so, 2/3 - 1/3 = 1/3.
15/4 - 6/5 , 300/20 -24/20, 276/20, 69/5
The answer is opposites apex. I hope this helps