(7/15-3/40-1/24): 0,7 дробь (2,4*1/3-3)*5/11* 1целая5/6: (3/4-1целая2/3)дробь(4/9-5/12+0,75)*3/7=

(7/15 - 3/40 - 1/24):0,7 = 1/2
(2,4*1/3-3)*5*11*1[целая]5/6 = -11/10
3/4-1[целая]2/3 = -11/12
(4/9-5/12+0,75)*3/7 = 1/3
1/2 : (-11/10) : (-11/12) : 1/3 = 30/121