Дробь 2/3, 1/2, 3/4, 1/6, 4/15, 7/20 ,11/30. к знаменателю 60. сократите дробь 6*15 / 5*12, 18*21/ 14/36, 11 *9 / 15 * 22

2/3=2*20/3*20=40/60
1/2=1*30/2*30=30/60
3/4=3*15/4*15=45/60
1/6=1*10/6*10=10/60
4/15=4*4/15*4=16/60
7/20=7*3/20*3=21/60
11/30=11*2/30*2=22/60

6*15/5*12=1*3/1*2=3/2
18*21/14*36=1*3/2*2=3/4
11*9/15*22=1*3/5*2=3/10