Answer:
the other rational number is 2/1.
Explanation:
-2/5 + x = 8/5
To solve for x, we need to isolate it on one side of the equation. We can do this by subtracting -2/5 from both sides:
x = 8/5 + 2/5
Simplifying the right side:
x = (8 + 2)/5
x = 10/5
x = 2/1
Therefore, the other rational number is 2/1.