Умоляю помогите а)4 2/3*1 2/7= ( 2/3 это дробь) б)5/8*4/5= в)9/25*2 1/7= №2 1)(9-2 2/3*2 1/7)*21/46= Всё по действиям!!!Даю 40 балов

4 2/3 * 1 2/7 = 14/3 * 9/7 = 65/8 * 4/5 =  20/40=1/29/25 * 2 1/7 = 9/25 * 15/7 = 27/35(9 - 2 2/3 * 2 1/7) * 21/46 = 1 1/21) 2 2/3 * 2 1/7 = 8/3 * 15/7 = 40/7 = 5 5/72) 9 - 5 5/7 = 9 - 40/7  = (9*7 - 40*1)/7 = (63 - 40)/7 = 23/7 = 3 2/73) 3 2/7 * 21/46 = 23/7 * 21/46 = 3/2 = 1 1/2