The answer is 4/9.
First you’d find the least common denominator for the fractions,, which would be 9.
You then multiply the first fraction by 3 to make it equal to 9.
The new equation would be -3/9+7/9.
Add it up, and it would equal 4/9.
-1/3+7/9
-1/3=-3/9
-3/9+7/9=4/8
