приведите к знаменателю 60 дробь 1)2:3 2)1:4 3)2:5 4)7:12 5)4:15 6)9:20

2/3 = 20/60

1/4 = 15/60

2/5 = 24/60

7/12 = 35/60

4/15 = 16/60

9/20 = 27/60

1) 2/3 , 1/4, 2/5, 7,12, 4/15, 9/20

   40/60, 15/60, 24/60, 35/60, 16/60, 27/60