To solve this, we will change the division operation to multiplication by finding the reciprocal of the second fraction.

For the first expression:
(-5/6) ÷ (-5/12)
= (-5/6) * (-12/5)
= 60/30
= 2

For the second expression:
-3.3/4 ÷ 1.5
= -3.3/4 * 2/3
= -11/20

For the third expression:
-1.7/9 ÷ (-2.2/3)
= -1.7/9 * -3/2.2
= 51/19.8
= 2.57575757576 or approximately 2.58

So, the final evaluation of the expression is -11/20 and 2.58 respectively.