Делим числитель на числитель и знаменатель на знаменатель:
1) (2/3) : (5/7) = (2/3) * (7/5) = 14/15
2) (1/4) : (1/2) = (1/4) * (2/1) = 2/4 = 1/2
3) (2/5) : (2/3) = (2/5) * (3/2) = 6/10 = 3/5
4) (3/4) : (1/2) = (3/4) * (2/1) = 6/4 = 3/2
5) (5/6) : (7/12) = (5/6) * (12/7) = 60/42 = 10/7
Делим числитель на числитель и знаменатель на знаменатель:
1) (2/3) : (5/7) = (2/3) * (7/5) = 14/15
2) (1/4) : (1/2) = (1/4) * (2/1) = 2/4 = 1/2
3) (2/5) : (2/3) = (2/5) * (3/2) = 6/10 = 3/5
4) (3/4) : (1/2) = (3/4) * (2/1) = 6/4 = 3/2
5) (5/6) : (7/12) = (5/6) * (12/7) = 60/42 = 10/7