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
2/3 = 20/60
1/4 = 15/60
2/5 = 24/60
7/12 = 35/60
4/15 = 16/60
9/20 = 27/60
