The number is greater than - 6 2/3 and less than - 6 1/2.
We focus on the 2/3 and 1/2
Since it is a negative number we think of a fraction less than 2/3 and greater than 1/2, because of the negatives.
2/3 is around 0.66, 1/2 is = 0.5, Example is 0.6 = 6/10 = 3/5
A number that fits is -6 3/5.
Check:
- 6 2/3 ≈ -6.66
-6 3/5 = - 6.60
-6 1/2 = -6.50
-6.60 is greater than -6.66, and less than -6.50