What is the error and what is the correction?

-1/4 / 3/2 = -4/1 x 3/2 = -12/2 = -6

- 1 / 4 / ( 3 / 2 ) = - 1 * 2 / ( 4 * 3 ) = - 2 / 12 = - 2 / ( 2 * 6 ) = - 1 / 6