Числитель:
(4 5/12 - 3 7/18 ) :9,25 + 5/6 =
= (4 15/36 - 3 14/36) : 9,25 + 5/6 =
= 1 1/36 : ( 37/4) + 5/6 =
= 37/36 * 4/37 + 5/6 =
= 1/9 + 5/6 = 2/18 + 15/18 =
= 17/18
Знаменатель:
(0,4 + 1/8 +0,75) * 2/3 =
= (0,400 +0,125 + 0,750) * 2/3 =
= 1,275 * 2/3 =
= 1275/1000 * 2/3 =
= 51/40 * 2/3 =
= (17 * 1) /(20 * 1) =
= 17/20
Получилась дробь :
(17/18) / (17/20 ) = 17/18 : 17/20 = 17/18 * 20/17 =
= 20/18 = 10/9 = 1 1/9