Приведите обыкновенные дроби 20/31 к обыкновенной броби со знаменатилем 62 124 279 310
20/31 = 40/62, 20/31 = 80/124, 20/31 = 180/279, 20/31 = 200/310
20/31 = (2/2 * 20/31) = 40/62, 20/31 = (4/4 * 20/31) = 80/124, 20/31 = (9/9 * 20/31) = 180/279, 20/31 = (10/10 * 20/31) = 200/310