-8/15+4/15
To add fractions with the same denominator, add their numerators and keep the same denominator.
(-8/15) + (4/15) = (-8 + 4)/15 = -4/15
To add -8/15 and 4/15, you need to have a common denominator. The denominator in this case is already the same (15), so you can directly add the numerators:
-8/15 + 4/15 = (-8 + 4)/15 = -4/15
Therefore, -8/15 + 4/15 = -4/15.