Answer:
4/15
Explanation:
When subtracting a negative, the negatives cancel and make a positive.
-1/3 - (-3/5)
-1/3 + 3/5
Now, you have to make the fractions have common denominators. Do this by multiplying the bottom number to get the least common multiple. Multiply the numerator by the same number you multiplied the denominator.
(-1/3)(5/5) + (3/5)(3/3)
-5/15 + 9/15
4/15
The simplest form is 4/15.