Question 23089
Work with the parenthesis firs:
3/4-1/2= 3/4-2/4 = 1/4
Multiply this by (1/2) to get 1/8
Then 2/3-1/8 = (16-3)/24 = 13/24
Multiply by -3/5 to get -39/120 

Cheers,
Stan H.