can someone check my answers please

Question

add
-3/5 +(8/35) = -13/35

find the reciprocal of 1/3 (9-4)= 5/3

subtract 7/9-(-13/18)=3/2

find the reciprocal of -1/9(-9-3)=4/3

Answer 1

the first three are correct.

If the last is this:
-1/9 * (-12/1), then the reciprocal is

9/12 or 3/4

Answer 2

thank u