Дробь 2/7 заиените дробями со знаменателями: 14; 21; 35;42;63;70;84;77;98.
2/7 = 4/14 доп.множ.2 2/7 = 6/21 доп.множ.3 2/7 = 10/35 доп.множ.5 2/7 = 12/42 доп.множ.6 2/7 = 18/63 доп.множ.9 2/7 = 20/70 доп.множ.10 2/7 = 24/84 доп.множ.12 2/7 = 22/77 доп.множ.11 2/7 = 28/98 доп.множ.14
2/14,2/21,2/35,2/42,2/63,2/70,2/84,2/77,2/98