Помогите пожалуйста!!! 51/55 : (8/25 + 9/20) - 64/35 · 5/4 = 1) 2) 3) 4)

Question

Помогите пожалуйста!!!
51/55 : (8/25 + 9/20) - 64/35 · 5/4 =
1)
2)
3)
4)

Answer 1

1) 8/25 + 9/20 = (32+45)/100 = 77/100
2) 51/55 : 77/100 = (51*100)/(55*77) = (51*20)/(11*77) = 1020/847
3) 64/35 * 5/4 = (64*5)/(35*4) = 16/7
4) 1020/847 - 16/7 = (1020-1936)/847 = -916/847