376. Сократить дроби.

1) 16/56 = 2/7, 21/49 = 3/7, 27/72 = 3/8, 26/130 = 2/10, 96/144 = 2/3, 360/430 = 36/43, 378/630 = 6/10, 646/874 = 323/437, 720/9720 = 2/27; 2) 18/36 = 1/2, 22/55 = 2/5, 17/340 = 1/20, 450/210 = 15/7, 169/720 = 169/720, 810/455 = 162/91, 6480/540 = 12/1, 1001/8910 = 11/90.