Final answer:
To add 2/9 and 2/9, find a common denominator (in this case, 9) and add the numerators together.
Step-by-step explanation:
To perform the indicated operation of adding 2/9 and 2/9, we need to find a common denominator. In this case, the common denominator is 9. We can add the numerators together and keep the common denominator:
2/9 + 2/9 = (2 + 2)/9 = 4/9
So, the simplified answer is 4/9.