Ответ Автор - granny23 (4,75-21/8):0,8 = (4 3/4 - 2 5/8): 4/5 = (4 6/8 -2 5/8): 4/5 = 2 1/8 * 5/4 == 17/8 * 5/4 = 85/32 = 2 21/32