Two thirds.
1/3 +1/3 = 2/3.
You don’t add the denominator (bottom terms), you only add the numerators (the top terms)
3^2/3^4
To find the answer, we can use this equation:
a^m / a^n = a^m - n
We can now just use 2 - 4, which equals -2.
Now we have 3^-2
3^-2 in decimal form is 0.11111, which equal to 1/9