Answer: -8.5
Steps:
P - parenthesis
E - exponents
M - multiply and dividing from left to right.
D - multiplying and dividing from left to right.
A - adding and subtracting from left to right.
S - adding and subtracting from left to right.
9 * 3 * (-2) + (-36) / 12 -1
27 * (-2) + (-36) / 12 - 1
-54 + (-36) / 12 - 1
-90 /12 - 1
-7.5 - 1
-8.5
