Объяснение:
7/9×7/5=49/45
49/45÷7/12=49/45×12/7=84/45=1 39/45
7/9 * 7/5 : 7/12 =
= 7/9 * 7/5 * 12/7 =
(сокращаем 7 и 7, 12 и 9)
= (7 * 4) / 5 =
= 28/5 = 5 3/5
