17\24-(1\5+5\24)=
5\48+7\36=
17\24-(1\5+5\24)=17\24-(24/120+25/120)=17/24- 49/120=85/120-49/120= 36/120 = 3/10 =0,3 5\48+7\36=180/1728 + 336/1728=516/1728=172/576