Выполните действия: (9-2 2/3* 2 1/7) * 21/46=

(9 - 2 2/3 * 2 1/7) * 21/46 = 1 1/2
1) 2 2/3 * 2 1/7 = 8/3 * 15/7 = (8*5)/(1*7) = 40/7 = 5 5/7
2) 9 - 5 5/7 = 8 7/7 - 5 5/7 = 3 2/7
3) 3 2/7 * 21/46 = 23/7 * 21/46 = (1*3)/(1*2) = 3/2 = 1 1/2