3
-16*13/24-5/4*38/15=-26/3-19/6=(-52-19)/6=-71/6=-11 5/6
-16:24/13=-16*13/24=-26/3
5/4:(-38/15)=-5/4*15/38=-19/6
-26/3-19/6=-52/6-19/6=-72/6=-11 /5/6
4
-8/5*10/3=-16/3
1-3/8=5/8
1/3-1=-2/3
5/8*(-2/3)=-5/12
5/8-(-5/12)=5/8+5/12=15/24+10/24=25/24=1 1/24