помогите плииз:

15/17+1/17-7/17

7/8-3/8+1/8

49/100-29/100+11/100

47/50+3/50-7/50

111/120-51/60+7/30

69/100+11/25-4/5

15/17+1/17-7/17=9/177/8-3/8+1/8=5/849/100-29/100+11/100=31/10047/50+3/50-7/50=43/50111/120-51/60+7/30=111/120-102/120+28/120=37/12069/100+11/25-4/5=68/100+44/100-80/100=32/100