Выполните умножение : 1) 4/5*15/16, 2) 3 1/3*1 2/25 , 3) 5/13*39

1) 4/5 * 15/16 = 3/4, 2) 3 1/3 * 1 2/25 = 10/3 * 27/25 = 18/5 = 3 3/5, 3) 5/13 * 39 = 5/13 * 39/1 = 5 * 3 = 15