Final answer:
The quantity 2/-9 is equal to -2/9. Hence, option c) is correct.
Step-by-step explanation:
The quantity 2/-9 is equal to option c) -2/9.
To divide two numbers, we need to keep the numerator (2) the same and change the sign of the denominator (-9).
Therefore, 2/-9 is equal to -2/9.