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