Сократите дробь 5-15 6-20 14-35 21-39 10-60 28-84 56-72 20-25 120-180 207-243
5/15 = 1/3, 6/20 = 3/10, 14/35 = 2/5, 21/39 = 7/13, 10/60 = 1/6, 28/84 = 1/3, 56/72 = 7/9, 20/25 = 4/5, 120/180 = 2/3, 207/243 = 23/27