Expand -5/6 (9b-12)

To expand a expression, we distribute the number outside the parentheses to each term inside the parentheses.

So, expanding the expression -5/6 (9b-12):

= -5/6 * 9b - 5/6 * (-12)
= -45b/6 + 60/6
= (-45b + 60)/6

Therefore, -5/6 (9b-12) expands to (-45b + 60)/6.