3 7/19 • (5/12+3/8): 1 1/3- 1 3/8 : (1 1/5-1/4)=?

Question

3 7/19 • (5/12+3/8): 1 1/3- 1 3/8 : (1 1/5-1/4)=?

Answer 1

1) 5/12+3/8=5*4/48+ 3*6/48=20/48+18/48=38/48=19/24

2)1 1/5-1/4=6*4/20 - 5/20= 24/20-5/20= 19/20

3) 3 7/19*19/24=64/24= 16/6

4)16/6: 1 1/3= 16/6: 4/3= 16/6 * 3/4=4/2=2

5) 1 3/8: 19/20= 11/8 * 20/19= 11*5/2*19= 55/38= 1 17/38

6) 2- 1 17/38= 21/38

Ответ 21/38