Ответ: А) 1/7 = 9/63 и 1/9 = 7/63Б) 2/3 = 8/12, 5/6 = 10/12 и 7/12 = 7/12В) 1/6 = 40/240, 7/8 = 210/240 и 2/5 = 96/240