Nick used the calculations below to find the product od the given fractions?

(3/5) (4/9) (- 1/2)


Step 1: (3) (4) (-1) / (5) (9) (-2)


Step 2: (-12) / (-90)


Step 3: 12/90


Step 4: 2/15


In which step did his error occur?

o Step 1

o Step 2

o Step 3

o Step 4