4_ 4/5:4/17:3_2/5=24/5:4/17:17/5= 24/5*17/4*5/17=24/4=6
(6_1/5- 4_1/3):1_1/3=(31/5-13/3):4/3=(93/15-65/15):4/3=28/15:4/3=28/15*3/4=7/5=1_2/5
4_ 4/5:4/17:3_2/5=24/5:4/17:17/5= 24/5*17/4*5/17=24/4=6
(6_1/5- 4_1/3):1_1/3=(31/5-13/3):4/3=(93/15-65/15):4/3=28/15:4/3=28/15*3/4=7/5=1_2/5