Числитель:
(4,35- (4/45 + 5/18) :4,4 ) :0,32 =
= (4,35- 11/30 * 10 /44 ) :0,32 =
= ( 435/100 - 1/12 ) : 0,32 =
= ( 87/20 - 1/12 ) : 0,32=
= ( 261 - 5) /60 : 32/100 =
= 64/ 15 : 8/25 =
= 64/15 * 25/8 = 40/3 = 13 1/3
Знаменатель:
(20-0,68 ) : 8,05 + 2 2/45 =
= 19,32 : 8,05 + 2 2/45 =
= 24 /10 + 92/45 =
= 12/5 + 92/45 =
= 108/45 + 92/45=
= 200/45 = 40/9= 4 4/9
Дробь:
13 1/3 / 4 4/9 = 40/3 : 40/9 =
= 40/3 * 9/40 = 9/3 =3
Ответ: 3.