Question

помогите номер 50 а и б

Answer 1

1/7 : 3/4=1/14 : 3/8
1/7*4/3=1/14*8/3
4/21=4/21 - верно

2/3 :4/5=1/3 : 2/5
2/3*5/4=1/3*5/2
5/6=5/6 - верно