1)4:15 = 4/15 = 8/30 = 16/60 = 20/75 = 24/90 = 32/120 = 40/150 = 44/165
2)20:31 = 20/31 = 40/62 = 80/124 = 180/279 = 200/310
1)
4:15 = 4/15 = 8/30 = 16/60 = 20/75 = 24/90 = 32/120 = 40/150 = 44/165
2)
20:31 = 20/31 = 40/62 = 80/124 = 180/279 = 200/310