When the exponent is negative, you need to move it to the other side of the fraction to make the exponent positive.
For example:
[tex]x^{-3}[/tex] or [tex]\frac{x^{-3}}{1}=\frac{1}{x^3}[/tex]
[tex]\frac{1}{y^{-7}}=\frac{y^7}{1}[/tex] or [tex]y^7[/tex]
[tex]\frac{1-2}{3^{-3}}[/tex] Move [tex]3^{-3}[/tex] to the other side of the fraction to make the exponent positive
[tex]\frac{(1-2)3^3}{1}[/tex] or (1 - 2)(3³)
(1 - 2)27 Simplify what's in the parentheses
(-1)27
-27 Your answer is the 1st option
