Answer:
Find a common multiple of -1/2 and -2/3.
[ NOTE: It is better to choose a higher common multiple so that you can get enough of numbers ]
Let's choose 60.
(-1/2) * 30 = -30/60
(-2/3) * 20 = -40/60
Now,
We can get the following numbers between -30/60 and -40/60
You can write any of these numbers as your answer.
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