3 1/2+2 2/5-4/5= 7/30+3/30+4 1/4= tolong dengan cara ya

). 3 1/2 + 2 2/5 - 4/5
=7/2 + 12/5 - 4/5
=7/2 + 12/5 - 4/5
=35/10 + 24/10- 8/10
=51/10
.
). 7/30 + 3/30 +4 1/4
=7/30 + 3/30 + 17/4
=10/30 + 17/4
=20/60 + 255/60
=275/60
=55/12