Помогите решить!!! Дам 28

1) а = 7/8 : 5 1/4     а = 7/8 : 21/4     а = 1/6 2) b = 4 2/9 : 6 1/3      b = 38/9 :19/3     b = 2/3 3) c = 4/9 * 1 11/16     с = 4/9 * 27/16      с = 3/4 4) d = 2/11 * 8 1/4     d = 2/11 * 33/4     d = 3/2 = 1 1/2 5) x = 1 2/3 : 2 7/9     x = 5/3 : 25/9     x = 3/5 6) y = 1 2/3 : 2 1/2     y = 5/3 : 5/2     y = 2/3 7) m = 3 3/7 : 4     m = 24/7 : 4     m = 6/7 8) n = 24 12/19 : 6     n = (24 : 6) + (12/19 : 6)      n = 4 + 2/19     n = 4 2/19