Ответ:

3 целых 1/3 · (2 целых 3/4 : 5 целых 1/2) = 1 целая 2/3

1) 2 3/4 : 5 1/2 = 11/4 : 11/2 = 11/4 · 2/11 = 2/4 = 1/2

2) 3 1/3 · 1/2 = 10/3 · 1/2 = 10/6 = 5/3 = 1 2/3